2012

Table Of Contents
TOOLTIPS
Controls the display of tooltips on the ribbon, toolbars, and other user
interface elements.
VISRETAIN
Controls the properties of xref-dependent layers.
VTDURATION
Sets the duration of a smooth view transition, in milliseconds.
VTENABLE
Controls when smooth view transitions are used.
VTFPS
Sets the minimum speed of a smooth view transition, in frames per second.
XLOADCTL
Turns xref demand-loading on and off, and controls whether it opens the
referenced drawing or a copy.
Set Options for 3D Modeling with Perspective Projection
You can set specific display options when working with 3D models using
perspective projection.
Using the Options dialog box, you can specify the following options when
your 3D model is set to use a perspective view:
Ground Plane (Options dialog box, Display tab, Colors). When perspective
projection is turned on, the XY plane of the UCS displays as a ground plane
with a gradient color. The ground plane displays a gradient from the ground
horizon to the ground origin.
Sky (Options dialog box, Display tab, Colors). The area not covered by the
ground plane is the sky, which displays a gradient color from the sky horizon
to the sky zenith.
Underground (Options dialog box, Display tab, Colors). If the ground
plane is viewed from below ground, the ground plane displays a gradient
from the earth horizon to the earth azimuth.
Ground Plane Grid (Options dialog box, Display tab, Colors). When
perspective projection is turned on, the grid displays as a ground plane grid.
Colors are set for major grid lines, minor grid lines, and axis lines.
158 | Chapter 5 Customize the Drawing Environment