Custom grid
Please add the ability to define custom grids for the work area. It's more than just cosmetic: It would be a great help for those of us with multiple heating zones on our printer beds. My Snapmaker Artisan's bed has a central heater and a peripheral heater; the central heater warms up much faster and takes less energy for those prints that don't go outside the central area. The real-life bed is actually imprinted with a grid and then a rounded rectangle where the central heater is.
