1. Click File | Customize Ribbon.
2. Click the Customize button to the right of Keyboard shortcuts.
3. In the Customize Keyboard dialog, click Home in the Categories field.
4. New Contour Map in the Commands field.
5. Click in the Press New Shortcut Key box and then press CTRL+SHIFT+C on the keyboard.
6. Verify that Assigned to reads [Unassigned].  This area displays the command that this shortcut is currently assigned to.
7. Click the Assign button to save it.
   
8. Click Close.
9. Click OK.

Now you can use CTRL+SHIFT+C to create a new contour map.

Updated December 2021