I need for individuals other than the original diagram creator to be able to edit a diagram. I have experimented with several different permissions settings, but the diagram is treated as an attachment and there are no permission settings for editing attachments. I can give everyone the ability to delete it, just not to edit it. The original creator is able to edit the attachment, but the edit icon is grayed out for other users. I am using version 1.2.3
Suggestions on how I can overcome this?