AutoCAD 2008 User's
Guide > Create and Modify
Objects > Create and Use
Blocks (Symbols) > Add Dynamic Behavior
to Blocks > Add Dynamic Elements
to Blocks >
Specify Custom Properties for Dynamic Blocks
When you create a dynamic block, you can specify custom properties for the block. You can also specify whether or not these properties appear in the Properties palette when you select the block reference in a drawing.
You can specify a defined value set for linear, polar, XY, and rotation parameters.
Point, linear, polar, XY, and rotation parameters have a property called Chain Actions. This property affects the parameter behavior if the parameter is part of an action's selection set.
