IIUC bug 148986, Impress slides can be moved forward/back also with the mouse buttons, provided mouse is supported. Here is my log for Logitech Cordless Click Plus. ButtonPress event, serial 38, synthetic NO, window 0x6e00001, root 0x6b1, subw 0x0, time 20335004, (133,68), root:(165,132), state 0x0, button 9, same_screen YES ButtonRelease event, serial 38, synthetic NO, window 0x6e00001, root 0x6b1, subw 0x0, time 20335236, (133,68), root:(165,132), state 0x0, button 9, same_screen YES ButtonPress event, serial 38, synthetic NO, window 0x6e00001, root 0x6b1, subw 0x0, time 20336300, (133,68), root:(165,132), state 0x0, button 8, same_screen YES ButtonRelease event, serial 38, synthetic NO, window 0x6e00001, root 0x6b1, subw 0x0, time 20336492, (133,68), root:(165,132), state 0x0, button 8, same_screen YES
Other Logi M585 mouse: ButtonPress event, serial 38, synthetic NO, window 0x6e00001, root 0x6b1, subw 0x0, time 21250652, (119,28), root:(151,92), state 0x0, button 9, same_screen YES ButtonRelease event, serial 38, synthetic NO, window 0x6e00001, root 0x6b1, subw 0x0, time 21250780, (119,28), root:(151,92), state 0x0, button 9, same_screen YES ButtonPress event, serial 38, synthetic NO, window 0x6e00001, root 0x6b1, subw 0x0, time 21251365, (119,28), root:(151,92), state 0x0, button 8, same_screen YES ButtonRelease event, serial 38, synthetic NO, window 0x6e00001, root 0x6b1, subw 0x0, time 21251478, (119,28), root:(151,92), state 0x0, button 8, same_screen YES
I have a mouse with prev/next pyhsical buttons, giving the same keycode: ButtonRelease event, serial 34, synthetic NO, window 0x1a00001, root 0x496, subw 0x0, time 1535782047, (67,73), root:(2829,556), state 0x10, button 9, same_screen YES ButtonPress event, serial 34, synthetic NO, window 0x1a00001, root 0x496, subw 0x0, time 1535782447, (67,73), root:(2829,556), state 0x10, button 8, same_screen YES confirming.