Autodesk AUTOCAD 2006 Command Reference Manual page 143

Rotate
Adds a rotate action to the current dynamic block definition. A rotate action
can only be associated with a rotation parameter. Specifies that the selection
set of objects will rotate when the action is triggered in a dynamic block
reference.
Specify selection set for action
Select objects: Select objects for the action's selection set
Specify action location or [Base type]: Specify a location in the block definition for
the action or enter base type to specify the type of base point
Base Type
Specifies the type of base point to use for the action.
Enter base point type [Dependent/Independent] <Dependent>: Enter the type of
base point for the action or press ENTER to use a dependent base point
Dependent
Specifies that the dynamic block reference rotates about the associated
parameter's base point.
Specify base point location <current>: Enter two values separated by a comma
or press ENTER to select the current location of the parameter's base point
Independent
Specifies that the dynamic block reference rotates about a specified base
point.
Specify base point location <XY location of associated parameter's base point>:
Enter two values separated by a comma or press ENTER to select the location of
the associated parameter's base point
Flip
Adds a flip action to the current dynamic block definition. A flip action can
only be associated with a flip parameter. Specifies that the selection set of
objects will flip around the reflection line of the flip parameter when the
action is triggered in a dynamic block reference.
Specify selection set for action
Select objects: Select objects for the action's selection set
Specify action location: Specify a location in the block definition for the action
Lookup
Adds a lookup action to the current dynamic block definition. A lookup action
can only be associated with a lookup parameter. When you add a lookup
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