How do I make parts where there isn't a tile not solid?

I'm making a part of my game where you can make your own level. But there's a problem. When I put the player on the Part of the layout where there isn't any tiles, the Player couldn't move. I think it's because the put the tile-map across the whole layout, and the tile-map is solid. So, how do I make parts of a tile-map that don't have a tile there not solid?

For my game I have the same problem. this is why I made another tilemap for no solid object.

For my game I have the same problem. this is why I made another tilemap for no solid object.

But then, how would people who play my game make there own levels?

Oh but if people can't move is because you place a tile with no image. You need to Erase the tile.

Oh but if people can't move is because you place a tile with no image. You need to Erase the tile.

Oh, wait. I just found out that I set the Player's layout to the UI instead of the game. NOW its working. Thanks for trying to help.