If your controller is using GRBL, then there are settings in GRBL to reverse the directions of travel - its simply a question of typing a value into the settings - There is a lot of information online how to do this. Try this: https://github-wiki-see.page/m/gnea/...-Configuration.

Note you can set many parameters in GRBL - taake care, ,and check what you are doing.

Keithw