[MAP Layer] images seen by gm only.

is there a way to toggle or flag an image on the GM layer to be seen by only the GM? i would like to place one image of a battlemap with no indicators for secret stuff for the players to see. then i would like to place a duplicate battlemap on top of the player map, only this one shows trap areas, secret doors, room numbers etc etc. But this second map can only be seen by the GM. i have found that when i have monster or trap image tokens on the GM layer they can get rather difficult to select when they are on top of each other.

Unfortunately, there isn't any more fine grained method of controlling visibility than to separate things onto the GM layer. There might be some usability solutions via the API (Pro level Perk), otherwise, using smaller single markers on the GM layer so they don't interfere with drag-select and pushing them to the back of that layer are your available tools.