Autodesk 057A1-05A111-1001 - AutoCAD LT 2009, Getting Started Manual

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Glossary
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system variable A name similar to a command used as a mode, size, or limit. Read-
only system variables, such as DWGNAME, cannot be modified
directly by the user.
template drawing A drawing file with preestablished settings for new drawings such as
aclt.dwt and acltiso.dwt; however, any drawing can be used as a
template.
text style A named, saved collection of settings that determines the
appearance of text characters—for example, stretched, compressed,
oblique, mirrored, or set in a vertical column.
thaw A setting that displays previously frozen layers. See also freeze .
(LAYER)
tiled viewports See model viewports .
tool palette tabbed areas within the Tool Palettes window that provide an
efficient method for organizing, sharing, and placing blocks and
hatches.
tree view A hierarchical list that can be expanded or collapsed to control the
amount of information displayed. Tree views are available in
DesignCenter, the Purge dialog box, and the Help system.
UCS See user coordinate system (UCS) .
UCS icon An icon that indicates the orientation of the UCS axes. (UCSICON)
user coordinate system
(UCS) A user-defined coordinate system that defines the orientation of the
X , Y , and Z axes in 3D space. The UCS determines the default
placement of geometry in a drawing. See also world coordinate
system (WCS) .
vertex A location where edges or polyline segments meet.
view A graphical representation of a model from a specific location
(viewpoint) in space.
See also viewport . (VPOINT, DVIEW, VIEW)
viewport See model viewports and layout viewports See also view .
(VPORTS)
window selection A rectangular area specified in the drawing area to select multiple
objects at the same time.
See also crossing selection and polygon
window selection .
xref See external reference (xref) .
zoom To reduce or increase the apparent magnification of the drawing
area. (ZOOM)
Term Definition