2011

Table Of Contents
object snap override Turning off or changing a running Object Snap mode
for input of a single point. See also Object Snap mode and running object snap.
ObjectARX (AutoCAD for Mac Runtime Extension) A compiled-language
programming environment for developing AutoCAD for Mac applications.
opacity map Projection of opaque and transparent areas onto objects, creating
the effect of a solid surface with holes or gaps.
origin The point where coordinate axes intersect. For example, the origin of
a Cartesian coordinate system is where the X, Y, and Z axes meet at 0,0,0.
Ortho mode A setting that limits pointing device input to horizontal or
vertical (relative to the current snap angle and the user coordinate system).
See also snap angle and user coordinate system (UCS).
orthogonal Having perpendicular slopes or tangents at the point of
intersection.
page setup A collection of plot device and other settings that affect the
appearance and format of the final output. These settings can be modified
and applied to other layouts.
palette A user interface element that can be either docked, anchored, or
floating in the drawing area. Dockable windows include the command line,
status bar, Properties Inspector, and so on.
pan To shift the view of a drawing without changing magnification. See also
zoom. (PAN)
paper space One of two primary spaces in which 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 model using the Model tab.
See also model space and viewport. (PSPACE)
parametric design Ability to establish relationships between objects, to drive
the size and orientation of geometry with model and user-defined parameters.
parametric drawing Feature in AutoCAD that assigns constraints to objects,
establishing the distance, location, and orientation of objects with respect to
other objects.
path curve Defines the direction and length that a profile curve is lofted,
swept, or extruded to create a solid or surface. (SWEEP, LOFT, EXTRUDE)
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
1024 | Glossary