Appearances menu is greyed out

[PS_9536501]

I am using Creo Parametric - Release 4.0 (connected) Release 4.0 and DatecodeM100

Appearances menu is greyed out

[VladimirN]

Please provide a screenshot of your issue.

[StephenW]

We really need more information.

With the information provided, the only possibility I can think of is the part or assembly is "locked" in the workspace so changes are not allowed/permitted.