Questions about getting MillMage to work with your grbl controller and your grbl controlled device belong here.
Please share details about your setup and your workflow as these can vary greatly depending on context, workflow and desired outcomes.
To help with providing actionable information necessary to assist you, visit: How To Ask For Help.
While formulating questions, you may also find it worthwhile to have a look through the grbl Github site.
Thank you,
The LightBurn Team