Thanks rob.
The objects are a tree from the archicad 10 library. I have simply changed the properties of the object. I tried what you suggested and im sorry to report it produced no change.
The legend on the right of my layout book (appears as a black block in my image below - has the arrow pointing at it) is simply a fill. The fill is set to empty fill and the background is set to -1 window background.
I hope i have understood your suggestion correctly - i went through the objects - confirmed the fill was set too "empty fill", i changed the fill pen to transparent, and confirmed the fill background pen was set to -1 window background.
That done i had no luck
. I must admit i have used this fill arrangement many times over and never had this problem. I have changed my grid background also to see if the background colour of my fill in my project map changes - and it did (matched the window background). Which leaves me thinking its a display propoerty than something to do with the fill or drawing itself - any thoughts?