OK, it is a feature, not a bug. Thanks for the follow-ups. As a fairly new user, I was just confused when I changed source jpegs for the mask, found that the change had been made but that the list of objects still gave the 'old' jpeg name. I use the list of objects constantly to swop jpegs in and out of slides. Now I have to check Properties, Mask, Open explorer to find the currently referenced mask. For other types of object the displayed name is updated as it is changed. Jeff