I had hoped that would not be the answer. (very time consuming compaired to boring.[but quick] microsoft program.)
I was doing that, but I guess I am used to pasting various sizes of same pic until it 'suits' background. This can mean maybe up to 20 'layers per pic x maybe 20 added pics for even small works. If I obtain right size in another program and then do as you say, and then add them to layer list (any limit on number of layers?) I hope to be able to work it out.
Thanks for the help anyway mate. I must say again, I am very impressed with all the other tools, effects etc available with Paint.Net.
Mike