Thanks folks - problem resolved. Another lesson learned in the "don't try doing tricky stuff when your eyes can't stay open" mode.
PKB - I had sussed "Borders" and seemed to remember clicking "Fills" (which I expected to be the way), but don't recall seeing a pallette drop down (which, of course, it did this morning).
FJJP - I needed the middle bit. I don't get a "Fills" option direct from the "Format"/"Cells" clicks.
Farmer - don't know what I've done but whilst I agree with you 100%, my PDA will not synch with either the laptop or the desktop computer (which is what I specifically bought it to do).
Thanks again, folks.