Many thanks 'Technicsplayer' for your most useful hints.
With your help and a little patience I have managed to get some music onto the KN7000.
Your suggestions on sizing are invaluable.
My main error, I think, was the colour resolution in Sibelius.
When I found how to set this to a low value of 256 colours this helped the blocky scores.
Your extra tweaks did the trick which is very pleasing.
It is rather a fiddle to crop the images in Photoshop and I get slightly differing sizes with each 8 bars but I suppose practice will improve this.
Do you use the grid on Photoshop for alignment? (I am actually using "Photoshop Elements" but it seems to serve).
Do you save each 8 bars as a page from Sibelius or do you save a full page and crop this repeatedly in Photoshop?
The next stage is to arrange to change alternate 4 bars as in the commercial disks.
I have not heard of anyone else using the KN7000 scoring feature and it is a most valuable asset to be able to read from the screen without a music stand as I cannot play without music. (Although most people say I can't play with music.)
I shall now add scores to some of my sequences that date back to the KN3000.
Again thank you.