A

Absolute coordinate system.

Coordinate system in which all geometry is located from a fixed or absolute zero point.

One of the views in the layout in which you can directly work.

The intersection point of a general conic's two end tangent vectors.

In Unigraphics NX, an angle measured on the X-Y plane of a coordinate system is positive if the direction that it is swept is counterclockwise as viewed from the positive Z axis side of the X-Y plane. An angle swept in the opposite direction is said to be negative.

The intersection between a curve and the projection of another curve that lies in a different plane. The curves must be nonparallel and the projection occurs along the ZC axis.

Approximate Rho basically involves treating an arc or spline as if it were a conic, and then computing the rho based on that premise. This can be useful in a number of cases. For example:

You may have a spline that resembles a conic, but has an inflection and a lot of data. Being able to get the rho value gives you a head start in replacing the spline with a simple conic.

You may have a group of cross section curves and want a section surface. If you can get the rho value for the section curves you can build a law function to create a section surface with varying rho.

Use the Information option to find the Approximate Rho for an arc or spline.

An incomplete circle; sometimes used interchangeably with the term "circle".

American Standard Code for Information Interchange. It is a set of 8-bit binary numbers representing the alphabet, punctuation, numerals, and other special symbols used in text representation and communications protocol.

The ratio of length to height which represents the change in size of a symbol from its original.

A collection of piece parts and sub-assemblies representing a product. In Unigraphics NX, an assembly is a part file that contains components.

A Unigraphics NX part file that is a user-defined, structured combination of sub-assemblies, components and/or objects.

The ability to tie together (link) separate pieces of information to aid in automating the design, drafting, and manufacture of parts in Unigraphics NX. See Associativity for further details.

Pieces of information that can be associated with Unigraphics NX geometry and parts such as assigning a name to an object.

In Unigraphics NX, a view that shows the true size and shape of a part's face.

B

A single segment B-spline.

A Unigraphics NX character font that is the default font used for creating text in drafting objects and dimensions.

A set of geometric objects that describes the containment of a part from a vantage point.

Modeling technique where component parts are designed and edited in isolation of their usage within some higher level assembly. All assemblies using the component are automatically updated when opened to reflect the geometric edits made at the piece part level. See Top-down Modeling.

A method of creating a b-curve by blending or bridging any two given curves at two specified points on the curves.

Abbreviation of nonuniform rational B-spline. Curve created from construction points. See NURBS.

Class of objects containing sheets and solids (see Solid Body and Surface Body).

C

Computer Aided Design/Computer Aided Manufacturing.

One of the five layouts available to the user. These include: L1 - Single View, L2 & L3 - Two Views, L4 - Four Views, and L6 - Six Views.

One of the canned views available to the user. These include (but are not limited to) the following: TOP, FRONT, RIGHT, LEFT, BOTTOM, BACK, TFR-ISO (top-front-right isometric), and TFR-TRI (top-front-right trimetric).

A name assigned to a layer, or subset of layers. A category, if descriptive of the type of data found on the layers to which it is assigned, will assist the user in identifying and managing data in a part file.

Computer Graphics Metafile. An ANSI standard format for picture files which can be easily moved between different operating systems and can be read by many viewing programs and plot despoolers.

A method of selecting a sequence of curves which are joined end-to-end.

A feature that depends on another for its existence. For example, a hollow cannot exist without a solid, such as a block, that the hollow can be formed in. Also called a "dependent".

A complete and closed arc, sometimes used interchangeably with the term "arc."

A list of options that allows the user to select objects by various methods.

Cutter Location File.

Cutter Location Point.

A single file array of points used to create a surface. Usually lined up along the V direction of the surface. See Rows and Columns for additional details.

A graphical display of a comb as extended along selected curves or splines, and which measures Curvature or Radius of Curvature by the length of its spokes (teeth).

A collection of objects, similar to a group, in an assembly part. A component may be a sub-assembly consisting of other, lower level components.

A separate Unigraphics NX part file that the system associates with a component object in the assembly part.

Defines the cone direction using the Vector Constructor (common tool) or Constructor.

Defines the base origin using the Point Constructor (common tool) or Constructor.

A conic or conic section is a curve that can be formed by intersecting a cone and a plane (parabola, hyperbola, ellipse).

Refers to methods you can use to refine and limit the parameters of objects. Constraints are used throughout Unigraphics NX operations (for example, Sketcher, Datums, Studio Surface, Through Curves, X-Form, Through Points, N-Sided Surface, Direct Modeling, Blends, etc). With Sketcher, the methods of constraint are geometric and dimensional. The general definition of a constraint refers to a restriction on the solutions that are acceptable for a problem.

Points used to create a spline. Construction points may be used as poles (control vertices), defining points, or data points. See Poles, Defining Points, and Data Points.

End-to-end, as in contiguous curves.

Continuity describes the behavior of curves and surfaces at their segment boundaries. The two types of continuity usually dealt with in Unigraphics NX are mathematical continuity, denoted Cn, where n is some integer, and geometric continuity, denoted Gn. Within Unigraphics NX these can be loosely defined.

Gn indicates the true degree of continuity between two geometric objects. For example, G0 means the two objects are connected, or are position continuous; G1 means they are smoothly connected up to one differentiation, or are tangency continuous. G2 means they are smoothly connected by up to two differentiations, or are curvature continuous; G3 means they are smoothly connected by up to three differentiations, etc. Gn continuities are representation (parameterization) independent. The curvature combs shown in the figure below illustrate these differences.

Cn indicates the degree of continuity between two segments of a b-curve or a b-surface in the NURB representation. Generically, C0 means the two segments are G0 connected. C1 means they are G1 connected; etc. But, C0 does not mean the two segments are just G0 connected -- they could actually be G1 or G2 connected, and so on.

The key point is that Gn is for real physical continuity, while Cn is one mathematical representation of it, which may not be faithful. Since NURB is an industry standard for freeform geometry, Unigraphics NX uses it. But we always try to have Cn represent the same degree of continuity as Gn, to avoid cases where a curve is G1, but has C0 junction, etc.

Quoting from the ICAD Surface Designer Reference manual: "C0 continuity implies that a common point exists between two adjacent segments (i.e., the segments are touching). C1 implies that there is a common point and the first derivatives of the polynomials (i.e., the tangent vectors) are the same. C2 implies that the first and second derivatives are the same. Geometric continuity is less strict than mathematical continuity. G0 and C0 are equivalent, that is, the segments are positionally continuous. G1 implies that the tangent vectors are equal in direction, but not magnitude. G2 implies the curvature is the same, but the second derivatives are not."

A position on existing geometry. Control points are: existing points, endpoints of conics, endpoints and midpoints of open arcs, centers of circles, midpoints and endpoints of lines, and endpoints of splines. The control point for a closed circle is its center, while the control points for an open arc are its end and midpoints. A spline has a control point at each knot point.

A polygon associated with a spline, and consisting of knot points denoting poles and connecting polylines. The control polygon can be used by some options to control the shape of the spline.

A vertex of the control polygon of a spline.

A system of axes used in specifying positions (CSYS).

A group of options used for defining coordinate systems in a variety of different ways. This subfunction is also used to change the work coordinate system and to rotate the part.

The right-hand rule determines the counter- clockwise direction. If the thumb is aligned with the ZC axis and pointing in the positive direction, counterclockwise is defined as the direction the fingers would move from the positive XC axis to the positive YC axis.

The layout currently displayed on the screen.

This is specified when creating a b-surface using the Cubic Fit method. Internal cross splines are not displayed by the system and are not selectable Unigraphics NX objects; rather, the system uses cross splines internally to help in the construction of b-surfaces.

A b-surface creation technique in which a sequence of curves running in a roughly parallel direction is selected, and the system then fits" them with a b-cubic b-surface.

The layout currently displayed on the screen. Layout data is kept in an intermediate storage area until it is saved.

Displays curvature as a curvature comb. Each of the teeth in this type of comb represents the curvature of the curve at that point. Specified with Modeling Preferences-> Curve Curvature Display.

A geometric object; this may refer to a line, an arc, a conic, spline or b-curve.

Unconstructed portion of an open arc. The part of a circle that has been cut away.

D

A comprehensive collection of information referring to the objects that make up a part.

Spline construction points for the Least Squares Fit method. A spline created with this method are fit to the points within a certain tolerance and do not necessarily pass through them.

A datum is a fixed point that anchors a sketch point to a specified location.

Assumed values when they are not specifically defined.

A face of a solid used to create a Midsurface.

Spline construction points. Splines created using defining points are forced to pass through the points. These points are guaranteed to be on the spline.

A mathematical concept referring to the degree of the polynomial in the equation defining the surface or spline. For additional details see Degrees.

Arrow-like indicators that show areas that require more information to fully constrain a sketch.

Same as Child.

The first derivative or tangent vector to a curve at a given point.

The ability to directly edit component geometry as it is displayed in an assembly. Geometry from other components can be selected to aid in modeling. Also referred to as edit in place.

In Unigraphics NX, a view that illustrates an enlarged section of another view (i.e., a blow-up).

A separate Unigraphics NX module that augments the capabilities of modeling by providing a suite of tools targeted for the design of sheet metal stamping dies.

This is a scalar value or expression which limits the measure of some geometric object such as the length of a line, the radius of an arc, or the distance between two points.

A hierarchical file organization structure which contains a list of filenames together with information for locating those files.

A file containing display data for retrieval of a part.

The part currently displayed in the graphics window.

A collection of an unlimited number of views. Stored data includes the reference point for each view.

E

See Design in Context.

A color coding option that helps distinguish geometry in the work part form geometry in other parts within the same assembly.

An end point of a curve or an existing point.

A tangential, normal, or angled surface created from an existing base surface using the Extension Surfaces creation method.

An arithmetic or conditional statement that has a value. Expressions are used to control dimensions and the relationships between dimensions of a model.

F

A region on the outside of a body enclosed by edges. In geometry, any of the bounding surfaces of a solid figure: a cube has six faces.

The name of the Face Pair feature that is created by two opposing defining faces.

The name of the Face Pair feature that is created with a user-selected surface.

The fundamental building block of a Midsurface feature. It contains two lists of opposing faces and the resulting Midsurface.

A read-only part file created from, and associated with, a template part and family table.

A table created from a template part, in the Unigraphics NX spreadsheet function, that describes the various attributes of the template part that you can change when you create a family member

A Unigraphics NX character font designed to provide faster Regenerate operations.

Features are objects that are associatively defined by one or more parents, and which retain within the model the order of their creation and modification, thus capturing its history. When a feature is edited, it's parents cause an update to the model to occur. Parents can be geometrical objects or numerical variables (Expressions). Features include all primitive, surface and solid objects, and certain wireframe objects (such as Law Curves and associative Trim and Bridge Curves). See the overview of Create Features for further details.

A group or unit of logically related data which is labeled or named and associated with a specified space. In Unigraphics NX, parts, patterns, schematic symbols, CL and Unigraphics NX Open GRIP source, GRIP intermediate, GRIP execution and Font Object data are all stored as files.

A rectangle or "box" composed of dashed line objects. The font box defines the size, width and spacing of characters belonging to a particular font.

A set of characters designed at a certain size, width and spacing.

Various styles of lines and curves, such as solid, dashed, etc.

A Unigraphics NX library containing font object files. Each file includes the necessary information for displaying a particular character font. The font object library can only be accessed through the Font Management option.

Various styles of lines and curves, such as solid, dashed, etc.

An ordered list of font names representing the character fonts available for the current part.

A surface body of zero thickness. (see Free Form Features)

G

A technique used when recording macros that assures they will always run, regardless of your location within Unigraphics NX when you launch them. To use Gateway Reset, simply make the first event in the recording of a macro, Application®Gateway. This cancels the current application, and places the macro at a known starting point in the user interface.

A contiguous set of curves, either open or closed, that can be swept or revolved to create a body.

A relationship between one or more geometric objects that forces a limitation. For example, two lines that are perpendicular or parallel specifies a geometric constraint.

The global layer mask for the entire part. The layer mask defines which layers will be visible and selectable. A view can use either the global or the individual layer mask.

A rectangular array of implied points used to accurately align locations which are entered by using the cursor location option.

Grouping is a procedure for conjoining selected objects so that they can be treated as a single object.

A collection of selected objects which are treated as a single object.

A set of contiguous curves that define a path for a sweep operation.

H

The half vertex angle defines the angle formed by the axis of the cone and its side.

In general, a printed copy of computer output - e.g., drawings or listings. More specifically, the output of the hard-copy unit often attached to a Unigraphics NX system.

I

See View Layer Mask.

A point on a spline where the curve changes from concave to convex, or vice versa.

The window used in listing operations, such as Information.

An individual menu in a sequence of menus used in performing a Unigraphics NX function.

Intersection formed by extending two line segments that do not touch to the position that they cross. The line segments must be nonparallel and coplanar.

Isometric view orientation - one where equal distances along the coordinate axes are also equal to the view plane. One of the axes is vertical.

An option which allows you to trim a b-surface in either the U or V isoparametric direction at a specified parameter.

J

Join Curve

A method of creating a b-curve in which curves (lines, arcs, conics or splines) may be selected for conversion into a b-curve.

K

Knot points

Points along a B-spline, representing the endpoints of each spline segment.

L

A layer is a partition of a part. Layers are analogous to the transparent material used by conventional designers. For example, the user may create all geometry on one layer, all text and dimensions on a second, and tool paths on a third.

A collection of viewports or window areas, in which views are displayed. The standard layouts in Unigraphics NX include one, two, four or six viewports.

This is a technique for fitting a spline to a series of construction points. The sum of the squares of all of the distances between the spline and the construction points is minimized. This method helps reduce the number of points needed to define the spline and helps ensure a certain degree of smoothness for the spline.

The usually scrolled window found in dialogs from which you select items. Referred to as a changeable window when it serves multi-purposes.

M

A series of interactive steps that are organized as a group and called as a unit.

A list of options from which the user makes a selection.

The name of the Midsurface feature.

A sheet body which is created halfway between two defining faces. The points and normals of the parent faces are averaged at corresponding parameters. The properties of a midsurface are exactly the same as any other sheet body; the only difference being the method of creation.

A feature that gives the user the ability to create and manipulate a list of Midsurfaces and its defining Faces Pairs. (For a description of how to use the Midsurface option, please see the discussion for Midsurface Feature under Preparing the Model in the Structures Application Help.)

A parameter or a status is said to be modal if it retains the value assigned to it when it was last used, rather than automatically reverting back to some default value after each usage.

The coordinate system of a newly created part. This is also referred to as the absolute coordinate system. Any other coordinate system may be thought of as a rotation and/or translation of the absolute coordinate system.

A b-surface sheet that consists of multiple segments.

N

The Native Mode File Management system is a part of the Common File Interface (CFI) that allows Unigraphics NX to interface with the native file system on your computer. The Native File Mode allows you to use standard operating system commands and directory structures to manipulate Unigraphics NX files.

The name of an expression is the single variable on the left hand side of the expression. All expression names must be unique in a part file. Each expression can have only one name. See Expressions.

The starting point, or zero position, of the Navigation Cursor, as specified when the Navigate option is invoked and MB1 is pressed and held down.

Acronym standing for Non Uniform Rational B-spline, often referred to as B-spline in the documentation.

O

All geometric entities within the Unigraphics NX environment.

A Unigraphics NX surface type created by projecting (offsetting) points along all the normals of a selected surface at a specified distance to create a true" offset.

A list of options (methods) used to select a large number of point objects using either any of the three available chaining methods or the standard Point Constructor method which allows for specification of required points in turn.

The point X = 0, Y = 0, Z = 0 for any particular coordinate system.

Projects views from a parent view (also called `base view'). The projected views are automatically aligned and scaled to match the parent view. By choosing the projection angle you want, selecting an existing model and indicating the parent view, you can construct a drawing containing various orthogonal views by simply choosing the view to be projected and the direction of the projection.

P

In a parallel projection, the lines are all parallel to a specified vector. The object is projected onto the view plane by passing parallel lines through each point at the object and finding their intersections with the view plane.

Concept used to define and control the relationships between the features of a model. Concept where the features of the model are defined by parameters.

A feature on which one or more feature(s) depend for existence. For example, if a block has been hollowed, the block is the parent of the hollow feature.

A collection of Unigraphics NX objects which together may represent some object or structure.

A template part and its family table and family member parts.

Variables that are not automatically changed by the system throughout the life of a particular part (e.g. character size and line width). These variables are filed with the part and will be in effect each time the part is retrieved from the library until explicitly modified by the user and filed with the part.

A component part which, for performance reasons, has not been fully loaded. Only those portions of the component part necessary to render the higher level assembly are initially loaded (the reference set).

A rectangular array of text containing a list of an assembly's contents together with a brief description of them.

Sections of a free form sheet body. Sheets can consist of a single patch or multiple patches. See Patches for additional details.

A collection of objects from a master part file that can be placed (merged) into your current part file as many times as necessary. A pattern is a single object, both from your point of view (e.g. selection, transformations, etc.) and from the system's point of view.

A point on a spline where the local radius of curvature is maximum.

In a perspective projection, all lines emanate from a common point; called the center of projection. An object is projected onto the view plane by passing those lines through each point at the object and finding their intersections with the plane.

A distribution of points on a curve between two bounding points on that curve.

A method for comparing checkpoints on curves or surfaces to corresponding points on curves or surfaces.

A list of options (methods) by which positions can be specified in Unigraphics NX. Also called Point Common Tool and Point Constructor.

A device which typically uses a pen to draw a permanent copy of the displayed image.

Spline construction points. Splines created using poles gravitate towards the points but do not actually touch them (except at the endpoints). Poles offer better control of the curvature of the spline than do defining points. Also called control vertices.

A b-surface consisting of an array of associative cube patches which can be exported to most other CAD/CAM/CAE applications.

Referring to a spline that has no breaks in it.

Primitive features are basic analytic shapes - Blocks, Cylinders, Cones, Spheres and Tubes. Primitives are nonassociative, meaning they are not associated to geometry used to create them. However, you can edit certain parameters.

A method to project certain types of geometry onto surfaces and planes. Also allows you to move or copy the object to be projected.

R

Displays curvature as a radius of curvature comb. Each of the teeth in this type of comb represents the radius of curvature at that point. This method emphasizes different characteristics of the curve when compared with the Curvature Comb option. In particular, inflection points are always evident with a Radius of Curvature Comb, which is not always the case with a Curvature Comb. Specified with Modeling Preferences-> Curve Curvature Display.

A part for which the user does not have write access privilege.

Produces smooth pan, zoom, and rotation of a part, though placing great demand on the CPU.

A named section or partition of a Unigraphics NX part created in the Assemblies application.

A view on a drawing in which you cannot directly work.

A function which causes the system to refresh the display list on the viewing screen. This removes temporary display items and fills in holes left by Blank or Delete.

Short for red-green-blue, representing a mixing model or method of describing colors, used with light-based media (such as monitors). RGB uses the additive primaries method, mixing percentages of red, green, and blue to get the desired color. Adding no color produces black, and adding 100 percent of all three colors results in white. Interactive options exist for RGB values in the Unigraphics NX Color Palette and High Quality Image Output Setup options.

The right-hand rule is used to determine the orientation of a coordinate system. If the origin of the coordinate system is in the palm of the right fist, with the back of the hand lying on a table, the outward extension of the index finger corresponds to the positive Y axis, the upward extension of the middle finger corresponds to the positive Z axis, and the outward extension of the thumb corresponds to the positive X axis.

The right-hand rule for rotation is used to associate vectors with directions of rotation. When the thumb is extended and aligned with a given vector, the curled fingers determine the associated direction of rotation. Conversely, when the curled fingers are held so as to indicate a given direction of rotation, the extended thumb determines the associated vector.

Rho is the projective discriminant, a scalar value that controls the "fullness" of each conic section. See Approximate Rho.

A single-file array of points used to create a free form sheet body. Defines the U direction of the sheet. See Rows and Columns for additional details.

S

A marker on the screen which the user moves around using some position indicator device. Used for indicating positions, selecting objects, etc. Takes the form of a full-screen cross.

The screen cursor contains a selection ball when necessary. A portion of an object must fall within this area to be selectable. The size of the selection ball is set in Preferences. The default radius is .125 inches and is centered at the cursor.

A list of opposing faces found in a Face Pair.

A b-surface sheet that consists of only a single segment.

A collection of geometric objects that closely approximates the outline of a particular design. You refine your sketch with dimensional and geometric constraints until you achieve a precise representation of your design. The sketch can then be extruded or revolved to obtain a 3D object or feature.

The SCS is a coordinate system that corresponds to the plane of the sketch. When a sketch is created the WCS is changed to the SCS of the new sketch.

The slope in the X-Y plane is the ratio of the Y change in relation to the X change between two points on the line.

All bodies created using curves including solid and sheet. A smart body will automatically update when you modify any of its creation parameters (that is, the defining curves, Rho, or the Row and Column degrees). See Smart Bodies for additional details.

An enclosed volume. A type of body (see Body).

A smooth free-form curve.

A contiguous series of lines and/or arcs connected at their end points.

A part that both contains components and is itself used as a component in higher-level assemblies.

The underlying geometry used to define a face on a sheet body. A surface is always a sheet but a sheet is not necessarily a surface (see Surface Body).

An object consisting of one or more faces not enclosing a volume. A body with zero thickness (see Body). Also known as Sheet Body.

The number of degrees covered by an arc.

The Unigraphics NX system.

T

Indicating a smooth spline. A tangent continuous spline has no "kinks" or "folds" in it.

A Unigraphics NX part file constructed in such a way as to allow a family of parts to be built based on it.

An empty part that is optionally created for any component parts that cannot be found during the loading of an assembly.

The allowable deviation from a standard, especially the range of variation permitted in maintaining a specified dimension in machining a piece; the total permissible variation in a size or location dimension; the difference between the permitted minimum and maximum sizes of a part.

Modeling technique where component parts can be created and edited while working at the assembly level. Geometric changes made at the assembly level are automatically reflected in the individual component part when saved. See Bottom-Up Modeling.

To shorten or extend a curve.

A viewing orientation which provides you with an excellent view of the principal axes. In Unigraphics NX II, the trimetric view has the Z-axis vertical. The measure along the X-axis is 7/8 of the measure along Z, and the measure along the Y-axis is 3/4 of the measure along Z.

U

Graphics Interactive Programming - A high-level language that provides the user with an optional means of operating the system. Almost any operation which can be performed interactively in Unigraphics NX can also be performed by executing the commands of a Unigraphics NX Open GRIP program. It performs mathematical computations, includes branching and looping capabilities, and allows the use of separately compiled sub-programs.

A Unigraphics NX module that provides tools specifically tailored for Industrial Design applications. This includes basic tools for the initial concept stages, such as the creation and visualization of virtual designs, and progresses ultimately through the production of primary and secondary surfaces.

Reversals of curvature in a spline.

The unit of measure in which you may work when constructing in Unigraphics NX. Upon log on, you may define the unit of measure as inches or millimeters.

A component that was originally created pre-V10, but has been opened in V10 or later and been upgraded to remove duplicate geometry.

Allows you to automatically run Unigraphics NX Open GRIP programs at certain points in Unigraphics NX.

A list of all valid Unigraphics NX user numbers and passwords. When a user logs on, the user number and password will be compared to those in the table.

Custom built dialogs from which you can launch macros and Unigraphics NX Open C and C++ Runtime and GRIP programs.

V

A defining point in certain geometric constructions. The vertices of a spline are the intersections of adjacent line segments forming the control polygon of the spline; the vertices of a polygon are the intersection points of adjacent sides of the polygon.

A particular display of the model. View parameters include view orientation matrix; center; scale; X,Y and Z clipping bounds; perspective vector; drawing reference point and scale.

A mode in which the user can edit a part in the current work view only.

Geometry created within a particular view. It will only be displayed in that view.

Modifications to the display of geometry in a particular view. These include erase from view and modify color, font and width.

A layer mask specific to a view. The mask will determine which layers are visible for that view. Use the individual mask to control layer visibility for specific views. Use the global layer mask to set layers for the entire part.

Perspective that allows you to select positions in a three dimensional environment. Indicating a cursor location with respect to the view of the cursor specifies a location in a plane parallel to the viewing screen. This is different than the cursor location in the Point Constructor which always specifies a position in the XC-YC plane.

W

Work Coordinate System.

The work coordinate system (WCS) is the coordinate system singled out by the user for use in construction, verification, etc. The coordinates of the WCS are called work coordinates and are denoted by XC, YC, ZC. The XC-YC plane is called the work plane.

Contains a list of all part files in which a specified component part exists.

The layer on which geometry is being constructed. You may create objects on only one layer at a time.

The part in which you create and edit geometry. The work part can be your displayed part or any component part that is contained in your displayed assembly part. When displaying a piece part, the work part is always the same as the displayed part.

The view in which work is being performed. When the creation mode is view dependent, any construction and view dependent editing that is performed will occur only in the current work view.

X

XC axis

X axis of the work coordinate system.

Y

YC axis

Y axis of the work coordinate system.

Z

Z axis of the work coordinate system.

Front and back clipping planes parallel to the X-Y plane of the view. Geometry is clipped to these planes. Only geometry which lies between the two planes is displayed.