Map Markers on GM layer

I'm trying to set up some markers on the world map to remind me of the players destination but since I don't want the players to see this I put it on the GM layer. The problem is that the markings are so faint against the map on that layer is super hard to see. Is there anyway to reduce the transparency of the object so that It's easier to spot?

There's only GM darkness opacity on the page settings, but I don't think that will help you. Maybe put auras on the tokens to highlight them, with a color contrasting to your map?

no luck so far =/

The GM Opacity setting is on the popup menu for layers on the Toolbar:

That'll do it! Thanks The Aaron!