Masking Hex numbers

Is there a way to mask hex numbers in a module or is that not possible?

What do you mean by “mask”?

If you’re referring to the hex numbers automatically drawn by the VASSAL hex grid, see the Draw Numbering option here: Grid Numbering. If you want to hide grid numbers that are part of the map image, then your best option is to edit the map in an external image editor.

He means to toggle on/off the Grid Numbering. Like ability to assign hot key. I looked and couldn’t find any existing functionality.

The use case is taking screen shots. Either for aesthetics or obfuscating the locations of items in screen shot. [In a space game where there is otherwise no identifying terrain]