How do I enable the numeric keypad on HTML5-RDP bookmarks?

Once connected to the RDP via the Bookmark :

1. Click on the SonicWall's logo on the top right.
2. Click on Control Keys.
   
   
   
3. Then a new tab will open, click on NumLK to enable Num Lock.
    
   
   
4. After this you will be able to use the numeric keypad.

See also:

https://www.sonicwall.com/support/knowledge-base/?sol_id=180920104056285