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default drawing See initial environment.
default lighting The lighting in a shaded viewport when the sun and user lights are turned
off. Faces are lighted by two distant light sources that follow the viewpoint as you move
around the model.
default value The value that is accepted when you press ENTER at a sub-prompt. The default
value is displayed in angle brackets <>. See also default.
definition points Points for creating a dimension. The program refers to the points to
modify the appearance and value of a nonassociative dimension when the dimensioned
object is modified. Also called defpoints and stored on the special layer DEFPOINTS.
definition table The nongraphical data area of a drawing file that stores block definitions.
dependency highlighting In a dynamic block definition, how associated objects are
displayed when you select a parameter, grip, or action.
dependent named objects (in xrefs) Named objects brought into a drawing by an external
reference. See also named object and symbol table.
dependent symbols See dependent named objects (in xrefs).
DGN underlay See underlay.
DIESEL For Direct Interpretively Evaluated String Expression Language. A macro language for
altering the status line with the MODEMACRO system variable and for customizing menu
items.
diffuse color An object's predominant color.
dimension line arc An arc (usually with arrows at each end) spanning the angle formed
by the extension lines of an angle being measured. The dimension text near this arc
sometimes divides it into two arcs. See also angular dimension.
dimension style A named group of dimension settings that determines the appearance of
the dimension and simplifies the setting of dimension system variables. (DIMSTYLE)
dimension text The measurement value of dimensioned objects.
dimension variables A set of numeric values, text strings, and settings that control
dimensioning features. (DIMSTYLE)
dimensional constraint Parametric dimensions that control the size, angle, or position of
geometry relative to the drawing or other objects.When dimensions are changed, the object
resizes.
2652 | Chapter 52 Glossary