Further explanation: It is not the dock I am refering to and efinitely, not an app. Apps don't have these symbol in their toolbars. So perhaps it's not called a toolbar. For example, If I open the Mac harddrive window, I find the following items at the top (toolbar). Going left to right; forward and back arrows, red, yellow and green buttons, the question mark, four boxes labeled View, three boxes labeled Quick Look, Drop Box, and Action, Search window, a folder labeled Miscellanous Docs, and finally, a minimize button.