I would like to add a sheet to my drawing with a 'legenda', like on a cartography map. (showing the crosshatch pattern for swamps, pine forrests, ... )

Showing the differten crosshatch patterns for de different materials.

I wonder if it is possible to draw a rectangle in a drawing and assign that a 'material', so that when the crosshatch of a certain material would change, the 'legenda' would update too.