Port Binds

[mitu]

Then what exactly did you change - and it's not saved ?

[Jezza]

Port 2 Binds = mouse index 3

[mitu]

I thought you're just switching device order - the mouse index doesn't look like it's part of the remap file.
Create a .cfg file for the game (<GAME_NAME>.cfg) alongside the ROM file and add to it

input_player1_mouse_index = 0
input_player2_mouse_index = 3

See more details about per-game configs in https://retropie.org.uk/docs/RetroArch-Configuration/#config-hierarchy.

[Jezza]

SOLVED
once again Mitu, THANKYOU

this setup works so well because player 1 can use the standard controls or the light gun + player 2 can use the stick or the trackball with standard buttons as the shoot / grenade !!!!!!!!! much the same for all games

[Jezza]

! !