To enable visibility states (add a
visibility parameter)
In the Block Editor, in the Block Authoring Palettes window,
Parameters tab, click the Visibility Parameter tool.
(Optional) Follow the command prompts to specify the following
for the parameter:
Name
Label
Description
Properties displayed for the block reference
NoteYou can also
specify and edit these properties in the Properties palette at a
later time, after you've added the parameter to the block
definition.
Do one of the following to specify a location for the
parameter:
Use the pointing device.
Enter the X and Y
coordinate values, separated by a comma.
This is the
default location for the visibility parameter grip.
On the Block Editor toolbar, click Save Block Definition.
(Optional) If you are finished using the Block Editor, click
Close Block Editor.
Toolbar: Block
Editor 
