[franky]

What do you meen with changes?
Your screenshot above already shows your "X10 WTI RF receiver" with the button "EDIT KEYMAP".
You only have to press that button "EDIT KEYMAP" for learnig the buttons of the RC.
You can learn all buttons new or you can change the function of RC buttons.

[Marcin]

Thanks.
Edit keymap works but I have the next problem.

When I try to move to the next item in the VDR menu. Instead of moving forward one step, it immediately jumps forward three steps.. This only happens with the remote control. When I use the keyboard, everything is fine.

[franky]

Most RCs are working with the global delay settings of the Repeat settings made in the WebIF very good.
For this RF RC the repeat settings in the VDR Setup are working better.
This settings you will find in the VDR-OSD - System - VDR-Setup - 8-Miscellaneous
Standard for "Remote Control repeat delay" and delta are 0. Then the global settings of the WebIF are used.
For my RF RC a delay of 350 and a delta of 150 is working good.
After change restart VDR. Then the RC should work better and ignores the global settings.
Or try the settings you are using in MLD 5.3 for your RC.