Kore, Android Kodi Remote Delete Button

Hello, First of all sorry about my english…

I use Kodi 17 on my W10 HTPC, i use a Android phone to control kodi with the “Kore, Kodi Remote” app.

I want to make “Remove from Libary” faster with a button on my android kodi remote, i have to go into different menus to remove some files.

I have tried the addon “Keymap editor” to remap “Delete” to the “Nine dots button (I dont know how to call that button, the button under Go Right button)”
But Keymap editor dont shows a number when i press any button on the android remote.

Is it possible to remap the “nine dots button” ?
Or is there any other shortcut on the Android Remote for deleting files?

Regards Michael