Arduino MEGA 2560 and GRBL......can't find limits/homing option.

Hi all,

OK so I am using (trying to) GRBL 0.8 fork for MEGA 2560 (https://github.com/LETARTARE/Mega2560-grbl-0.81) it works brilliantly...BUT...despite all my efforts I can't get the homing ($16) option in GRBL Controller and hence can't get homing or limit switches working. Has anyone worked with this?

Using normal UNO and GBRL it all works fine and I have tried a few forks all with the same issue (no homing option) despite the fact that the GRBL versions have Homing.

Any advice would be greatly appreciated, thanks in advance.