Help please [RESOLVED]

Hopefully this will be my final question...

Ok, (this is hard to explain but i'll try my best) can you help me with when I place an object/tileset piece (e.g. a house) how to make it so it doesn't have white spaces and it has the colour of the background tileset (sorry if i'm not explaining very well)(e.g.I use the fill effect button and click on the grass tile and fill the screen in grass, then add a house and not make it have a white outline thing (black in the game))

P.S: This will be a HUGE Help if I figured out how to do it.

Change the layer.

Ah... You put it in the second or third layer. Also, use a font that we can see without highlighting... ><

EDIT: Dang it! Blizzard beat me by a second!

Use layer that has the orange square in the middle or the top.