Suppress, modify or hide properties of an object

[Monsieur]

Is it just me or EA bring new questions every hour of the day?

Is there a way to suppress of hide properties of an object? (I don't have a problem with the EA interface, but if i could change it just a little)
Example: Requirement > Properties...
How to suppress/hide the Difficulty field?
How to modify the Version field (in order to have a drop-down list for example)?

bonus:
Can we grey an attribute / field for a user role? (for example: "developper" can't change version of a requirement but he can see it grayed)

Thank you replier, who will bring me piece of joy by answering

[qwerty]

This has been asked for many times (search the Suggestions) but Sparx was able to close it eyes ever since.

q.

[Eve]

For the bonus question, look at workflow scripts.

Code: [Select]

Public Function CanEditVersion()
      If WorkflowUser.IsMemberOf("Developer") Then
            CanEditVersion = False
      Else
            CanEditVersion = True
      End If
End Function
For the other questions. The only way is an add-in that overrides context double clicked.