lighten background

[beaniecopter]

I am working on a single room, not an entire house. I created the room, but the background is a dark grey, with a black border. But the grids are difficult so see. Can I make the background lighter grey or even transparent (but still keep the black border)?

[okh]

Set room rendering to texture colour in preferences and apply a light colour to your floor. ok

[beaniecopter]

Thanks. It did not occur to me that in creating a room I actually am creating a floor. And to this point I have been thinking only about layout, so I did not think that TEXTURE was applicable.