2004

854 | Glossary
orthogonal Having perpendicular slopes or tangents at the point of intersection.
Ortho mode A setting that limits pointing device input to horizontal or vertical (rel-
ative to the current snap angle and the user coordinate system). See also snap angle and
user coordinate system (UCS).
pan To shift the view of a drawing without changing magnification. See also zoom.
(PAN)
paper space One of two primary spaces in which AutoCAD objects reside. Paper
space is used for creating a finished layout for printing or plotting, as opposed to doing
drafting or design work. You design your paper space viewports using a layout tab.
Model space is used for creating the drawing. You design your model using the Model
tab. See also model space and viewpoint. (PSPACE)
PC2 file Complete plotter configuration file. PC2 files contain all plot settings and
device-specific settings that were saved in previous versions of AutoCAD. See also PCP
file and PC3 file.
PC3 file Partial plotter configuration file. PC3 files contain plot settings information
such as the device driver and model, the output port to which the device is connected,
and various device-specific settings,
but do not include any custom plotter calibration
or custom paper size information. See also PMP file, STB file, and CTB file.
PCP file Partial plotter configuration file. PCP files contain basic plot specifications
and pen parameters that were saved in previous versions of AutoCAD. Plot settings
that are stored in a PCP file include pen assignments, plotting units, paper size, plot
rotation, plot origin, scale factor, and pen optimization level. See also PC2 file and PC3
file.
perspective view Objects in 3D seen by an observer positioned at the viewpoint
looking at the view center. Objects appear smaller when the distance from the observer
(at the view point) to the view center increases. Although a perspective view appears
realistic, it does not preserve the shapes of objects. Parallel lines seemingly converge in
the view, so measurements cannot be made to scale from perspective views. AutoCAD
has perspective view settings for VPORTS table entries as well as viewport objects.
When you are looking at a viewport with a perspective view, the UCS icon has a differ-
ent appearance.
personalization Customizes the AutoCAD executable file acad.exe during installa-
tion, by entering the user name, company, and other information.
photorealistic rendering Rendering that resembles a photograph.
pick button The button on a pointing device that is used to select objects or specify
points on the screen. For example, on a two-button mouse, it is the left button.
planar projection Mapping of objects or images onto a plane.
plan view A view orientation from a point on the positive Z axis toward the origin
(0,0,0). (PLAN)
pline See polyline.
PMP file Plot Model Parameter. File containing custom plotter calibration and custom
paper size information associated with plotter configuration file.
point 1. A location in three-dimensional space specified by X, Y, and Z coordinate
values. 2. An AutoCAD object consisting of a single coordinate location. (POINT)
plan view