How do I remove blue screen from the tile map

Hi,

I created a tile map but now across the whole layout a have blue screen and i dont know how to remove it.

I tried clicking on the arrow in the tilemap toolbar but when i click on the layout again the blue screen returns.

I guess you mean in the editor you are selecting the tile-map object (selected objects get blue) while you really want to select something behind it..

Either place the tilemap on a different layer and click the lock when you don't want to be able to select it or right click z-order send to bottom so the tilemap is behind the other objects..