Actions define how the geometry of a dynamic block reference will move or change when the custom properties of the block reference are manipulated in a drawing.
Scale selected objects relative to the base point specified by the action.
Move and stretch objects a specified distance in a specified direction relative to the base point specified by the action.
Rotate, move, and stretch objects a specified angle and distance.
Mirror selected objects in a dynamic block reference about a specified reflection line.
Lookup tables associate parameter values for the dynamic block reference with other specified data (for example, a model or part number).
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.