thanks guys, I knew it would be simple !

Hi all,

I'm very new to sketchup so learning as I go. I've imported a png drawing which is the flooplan for my house (which I want to plan an extension on). I want to be able to draw the walls etc on top of the picture but not have them connected to it, at the moment when I draw a wall and drag it upwards it brings the lines etc off the picture with it.

Is there a tutorial or quick tip you can point me in the direction of ?

thanks

paul