The Microsoft Office apps are customisable. You can activate and deactivate entire ribbons as well as modify them. You can also create your own ribbons.
In this post:
Required knowledge:
Ribbon
The below screenshots illustrate the process of activating the Developer tab (which is deactivated by default):

- Right-click on any of the menu tabs
- Select the Customize the Ribbon… option

- Select Options from the bottom of the File menu
- The Excel Options dialog should open on the Customize Ribbon section
- Activate the Developer tab as shown
- Left-click the OK button
Quick Access Toolbar
I also like to customize the Quick Access Toolbar; I always add the Close File command:

- Right-click anywhere on the Quick Access Toolbar
- Select the Customize Quick Access Toolbar… option

- The Excel Options dialog should open on the Quick Access Toolbar section
- Select All Commands
- Left click the Close File command
- Left click the Add » button
- To add the command to the selection box on the right
- You can reorganise the commands in the Quick Access Toolbar
- Left click the OK button
