Thanks Bird.
I've now managed to get the attachment up so it is a little clearer to explain. You see, because of the distance Ganymede is from Jupiter, and the fact that PPM Centre will always pick the most obvious target (in this case Jupiter) to centre, then Ganymede is always going to be out of frame.This frame original sixe is 480 high which means that as Jupiter is at the top, worse case scenario is that it will drop around 200 and so will ganymede. as Ganymede is already towards the bottom of the original frame I estimate that the overall height would need to be in excess of 560 which is greater than my original size. If only I could select what ppmcentre uses to centre I would be making progress. Is there a way of cropping th top of my frames as an AVI perhaps. Get rid of Jupiter and Io and my troubles are over. Does anyone have a suggestion?, I don't know of any way to do this
