folders?

Hotmail on my Samsung SM T580 tablet ( opperated by Android)
I want to rename folders on left list. not default one and can't do anything with user added.(long story).
. Have tried the "long" press ( right click) nothing happens . I can't even creat new folders. There is only one New its for new email nothing for new folder. I want to rename a few before deleting unwanted folders to shorten the folder list.
Thanks in advance