It would be nice to be able to create new email categories (e.g., in the Inbox, Drafts, Sent, Spam, etc.) while being able to delete ones that I don't use.

Also, since I label my folders, I need to be able to extend the area (move the divider line between the List/Label side and the Inbox/Compose section). I don't have enough room to read my labels or see if emails are sitting in those labeled categories. Most email providers allow the user to slide and adjust the sizes of the interface boxes and areas.

Thank you.