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 action parameters and all constraint 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.
Distance multiplier and angle offset override properties allow you to specify a factor by which a parameter value is increased or decreased.