2011

Table Of Contents
thaw A setting that displays previously frozen layers. See also freeze. (LAYER)
thickness The distance certain objects are extruded to give them a 3D
appearance. (PROPERTIES, CHPROP, ELEV, THICKNESS)
tiled viewports See model viewports.
TILEMODE A system variable that controls whether viewports can be created
as movable, resizable objects (layout viewports), or as nonoverlapping display
elements that appear side-by-side (model viewports). See also viewport.
tooltip A small box of text that identifies or explains an object or interface
element when the cursor hovers near or over it.
tracking A way to locate a point relative to other points on the drawing.
translucency How light is scattered through an object.
transmittance scale Increases or decreases the amount of energy a transparent
material transmits out to the scene.
transparency A quantity defining how much light is let through an object.
transparent command A command started while another is in progress.
Precede transparent commands with an apostrophe.
two sided material The positive and negative normal of the material will be
considered during the rendering process.
UCS See user coordinate system (UCS).
UCS icon An icon that indicates the orientation of the UCS axes. (UCSICON)
underconstrained geometry Objects with unsolved degrees of freedom are
underconstrained.
underground The XY plane of the user coordinate system when perspective
projection is turned on and when viewed from below ground. The underground
plane displays with a color gradient between the earth horizon (nearest to the
horizon) and the earth azimuth (opposite the horizon). See also ground plane
and sky.
1032 | Glossary