There is no such thing as a community menu, I don't know what you mean.
With basic HTML.
If you go to Tumblr's home page, it has a form for you to fill out to make an account with Tumblr.
If you want to tag someone in something on Tumblr you have to type @, and then start typing their URL, their URL will appear above (or below) in like a drop down menu, when you see their URL click on them and it will make a link that tags them in it and they will get notified that you tagged them.
You can use the Whisper App to make facts on Tumblr.
Sign up for a new account make one and get on Tumblr.
Hit 'Play Now' and then hit 'Home' and you will arrive at the Community Menu.
with a camera.
Alt + 3
You make it up.
Good usernames for Tumblr should be unique and creative. Make a username that is an expression of who you are and your personality.
go on tumblr
You have to make your own :)) Be creative and imaginary :))