All my static meshes/maps are blue what button do i click to undo this

i dont know what button i pressed but all of them are blue and i dont know what to do to revert the problem (undo button didnt work).

ive clicked on all the possible boxes like lit unlit etc and it didnt fix the problem. ive also uninstalled and reinstalled skd but it still looks that way and its not just on one map but all of the maps.

i know it has to be a button but i dont know which one can someone help please? im sorry for this being such a noob qs but i really want to continue making the map.

All my static meshes/maps are blue what button do i click to undo this