Hi - Like all my friends, I often use the tablet for my music, along with a "page pedal". These are essentially Bluetooth keyboards that can be programmed to have their two pedals send a specific pair of commands (for example, my Pageflip Butterfly sends PageUp/PageDown, Up/Down arrow, or Left/Right arrow). When xodo is not in full screen mode, it unsurprisingly processes these commands as if they were from a normal keyboard, cycling through menu options and such. . So I propose you provide an option that forces one of these pairs of commands to ALWAYS advance/goback the page.
Could you please contact us by submitting a support ticket so we can better assist you?