FTP access to the H2D rarely works, if not not at all.
I’ve only had access once with WinSCP and not at all with SpeedCommander v20. With the A1m, A1, and X1C, access with SpeedCommander v20 works perfectly.
I couldn’t find a way to do it other than from the printer menu
In H2D wiki, under laser platform, it is stated:
Install the grid panel
In addition to the slats, you can also add a grid panel (optional) to the slats pack to further meet the support needs of flexible materials (such as paper, leather), small materials, etc., as well as batch placement and engraving of multiple materials.