To free up more screen space, the ribbon can be minimised so that only the tabs are showing.
Minimise the Ribbon
1. Right-click on the ribbon
2. Select Minimize the Ribbon.
Only the ribbon tab names are now showing but if a tab is selected, the Ribbon maximises to allow the selection of a command and then minimises once the command is selected.
Maximise the Ribbon:
Right-click on the ribbon menu area.
Select Maximize the Ribbon.