Change motor direction with Full graphic smart controller

Hello,

i am building my own 3d printer.
As part of calibration process i need to reverse the motor direction to skip gantry back and forth.
I dont know if it is normal that you cant change the direction of your motors with the Full graphic smart controller.
So thats why i ask. Is that possible, did i oversee something in the configuration.h in Marlin?
I cannot calibrate printer if i need to remove the belt everytime gantry has reached end of printer.....
I need help please....

Kind Regards
BlueOrigin11

the LCD is for normal operation, not designed for setup or calibration.

Use a control program, such as printrun/pronterface

Ok. i will try this. Thanks a lot . Maybe its also bc i have not installed endstops yet....

Ok. now works... Should have installed endstop before....
Thanks a lot!