Delphi: How can I add a new category in ActionManager?

I'd like my actions to be organized in categories, but in the "Categories" box, I can开发者_开发知识库't add a new category.

When I click add standard action, it has different categories like "Edit", "Internet",... . Is it even possible to have custom categories or I am stuck with default categories?

Add a 'New Action' from the ActionManager's customize dialog, select the new action in the dialog, then in the 'Object Inspector' change its Category from '(No Category)' to something else.