Nice suggestion.  This is actually something we've discussed internally.  More like a Vector Mode Settings that would allow for a custom Vector Mode Preset or Presets...  I'd love to be able to show/remove Terrain Coloring (not just relative), Topo, VORs, Roads and more in Vector Mode. I've noted this on the wishlist again to revisit this in a development discussion.  Thanks posting on this.  Just a way to make the Vectore as Simple as wanted or as custom as needed.