Every once in awhile, a toolbar will "disappear".

What to do when that happens?

1. From the View menu select Toolbars.
    

2. A list of available toolbars will be displayed (refer to the sample below).
    

3. The toolbars that are open will have a checkmark to the left of the toolbar name. Click on the toolbar's name to restore it.
    

Refer to Article on Deleting and Moving Icons for a quick and easy method of deleting or moving an icon.

Refer to Article on Customizing Toolbars for tips on how to add/delete icons from toolbars.