A small information box that describes the function of the button.
Mini Toolbar
It changes into a mini toolbar.
toolbar option button
mini toolbar
You may mean the formatting toolbar, which is usually on by default and can be used to format text, but has other uses too.
transparent
Well honestly the quick access toolbar is the quick access toolbar.
Toolbar icon means that the icon in which the toolbar appears. It can be easily seen at the top right corner.
a screen tip
Depends on what version of excel you are using.
A mini toolbar gives you additional commands appears as you select and hover over text, or right click text in a document. it lets you change the font size, make the test bold, and all that stuff.