do the same but select keyboard input device
open redream and go to -input -keyboard -customize binds -main menu
set to something the defaults are not using like m
during game play press m key to bring up redreams menu.
I changed my controller to RT-joy push down to bring up menu
open redream and go to -input -controller -customize binds -main menu [set to something like LT-Joy push down]
now during game play push down LT-Joy should bring up redreams menu and select save slot, same for loading.