2012

When you work with constrained dynamic blocks in the Block Editor in
AutoCAD LT, you can modify the constraint values and delete constraints but
cannot add constraints in the Block Editor. You can manage the constraints
while in the Block Editor from the Parametric tab.
Modify 3D Point Clouds
While you cannot index or attach a point cloud in AutoCAD LT, you can open
drawings created in AutoCAD that contain point clouds. When an attached
point cloud file is unlocked, you can select the point cloud with a grip that is
displayed at the centroid of the point cloud.
NOTE You cannot explode a point cloud.
Turn Off Perspective View in an AutoCAD Drawing
Set the PERSPECTIVE system variable to 0 to turn off perspective view in an
AutoCAD drawing that is open in AutoCAD LT. You cannot turn on perspective
view in a drawing that is open in AutoCAD LT.
Quick Reference
System Variables
FIELDDISPLAY
Controls whether fields are displayed with a gray background.
PERSPECTIVE
Specifies whether the current viewport displays a perspective view.
POINTCLOUDDENSITY
Controls the number of points displayed at once for all point clouds in the
drawing view.
Work with Custom and Proxy Objects
Custom objects provide additional capabilities to the program and related
products. When the application that created the custom object is not available,
a proxy object is substituted in its place.
A custom object is a type of object created by an ObjectARX
®
(AutoCAD
Run-Time Extension) application, which typically has more specialized
capabilities than standard AutoCAD LT objects. Custom objects include
1434 | Chapter 34 Work with Data in Other Formats