In this toolbar add commands you use frequently, also you add your macro icon

Quick Access Toolbar

Quick access Toolbar will be in left top comer of worksheet, Default it have three icon  Save,Undo & redo.

We can add commands by click the drop down arrow

Quick Access Toolbar5

If you want to add Print preview and email, just tick those option to add in your Quick access toolbar

Quick Access Toolbar6

Quick Access Toolbar2This icon help you to minimize , Maximize, restore & close the worksheet

Quick Access Toolbar3