Thanks so much to both. I must revisit the tweaks. I got put off once when using one of them, which tiled a nonrepeating background in the work window, making it almost impossible to continue with the design. Note to self... use the tweak after you have finished the rest if the design!

I think drwyd might have an interesting solution, too. I did find something similar on a different forum, but that didnt render the bkgrnd properly and I couldn't fix it. Will try all the kind advice, and report back. Really appreciate the help.