Justin Tadlock 3 years ago The “Custom Capability” box on the side is for adding capabilities that do not already exist to a role. Once that capability is added to any role, it’ll always appear under both the “Custom” and “All Tabs” for all roles going forward. So, if you’re using a plugin that has a capability named do_something_cool, you simply type do_something_cool in the input box and click the “Add New” button. I hope that’s what you’re asking about. I was a little unsure because you kept referring to editing capabilities. You can’t “edit” capabilities, so it’s kind of throwing me off a bit reading your post. You can add a new capability (as described above). You can also grant or deny a capability to a role. I just want to make sure we’re on the same page. Using the correct terminology helps with that.