Photoshop 7.0.1 legacy version: trying to double image length but recieve "could not complete this action as the resulting image would be too large" error. My work deals with large files but well within researched 300000 pixel limit. For my work i double image length and copy+paste the same image so two are stacked. Keep recieving error when trying to update canvas size and when moving individual layers around. All research speaks of options my version doesn't contain like .PSB files etc. Any ideas? Do i need to update to a new version?