Hmm the code block got messed up and I cant edit it.
/opt/retropie/configs/arcade/retroarch.cfg input_player1_select = "alt" input_player1_select_axis = "nul" input_player1_select_btn = "0" input_player1_select_mbtn = "nul" input_player1_start = "num1" input_player1_start_axis = "nul" input_player1_start_btn = "0" input_player1_start_mbtn = "nul"