Hi All,
I was trying to hide/disable the "Mark Complete" button from the home page of the ribbon for custom activity entity.
Created a solution with this entity and used ribbon workbench tool to hide, but I am unable to see this button.
As you can see in the below screenshot on the same...
Please suggest me how to hide this button..

Ribbon Workbench Tool..

Regards,
Srikanth Reddy