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object One or more graphical elements, such as text, dimensions, lines, circles, or polylines,
treated as a single element for creation, manipulation, and modification. Formerly called
entity.
Object Snap mode Methods for selecting commonly needed points on an object while you
create or edit a drawing. See also running object snap and object snap override.
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)
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