When I reverse engineer a class from java library I usually  obtain
a Class element that contains a lot of attributes an operations.
For now I should manually check/uncheck the attributes that I need.
It is very slow and boring.

It is better that the dialog allows to hide/show:
- set/get methods
- private/protected/package/public methods
- overriding methods (methods from parent elements) 
 and etc.

One more usability enhancement is to show the dialog when user selects the
element and presses and holds the <Ctrl> key (or any another key).
To hide the dialog user should release the key.
It makes faster to adjust some elements on the diagram.