Making sub folders in your INBOX

Something I searched for ages for and never found on the web is the ability to create a sub folder of your INBOX in an IMAP account in Mail.app on a Mac.

I figured it out today. When you want to create a new folder under your INBOX, and not just at the same level, (if you are trying to do this, you will understand what I mean), here's what you do:

1) Select the inbox you want to create the folder in.

2) click on the + button under your folder list on the left.

3) When a window pops up asking what to call the folder, type INBOX/NewFolderName

Thats it, nothing will happen for a few seconds, and then voila NewFolderName will appear under your INBOX.