Excel toolbar?
 

I was able to use the toolbar this morning working on my spreadsheet, but I
think I did something to the system unknowning and now I can't use the
toolbar. The only icon I can use is "print", "open", and "preview". Why is
all the other icons grey? I have reset the system but it's still the same.
How can I turn the icons back to black so I can start using them again.