The steps depend on your user interface mode.
User Interface Mode
Ribbon or Reflection Browser
With a session open in Reflection, from the Quick Access Toolbar, click .
On the Reflection menu, tap the gear icon and then select Document Settings.
From this dialog box, select a keyboard map file to use with this session.
Select this option to show the keyboard map files distributed with Reflection.
Select this option to show the keyboard map files that you've previously modified and saved. If the file you want doesn't appear in the list, click Browse to select it.
Note: The file must be in a trusted location.
Select the Keyboard Map for a Session
Specify Trusted Locations Dialog Box