cant make changes on menu!

hi…I am logged in as admin…but for any reason I cant make changes on menu item.

It shows: “Your Builder access level doesn’t allow you to change these settings.”

How can I get full access to ad or move menu items?

I am new in working with bricks… I try to find out how it works… but here I really dont know what changes I need to do, sothat I can make changes…

zhx in advance…