I’ve made a slideshow in V.5. It comprises some 450 slides, about 420 1024X768px files displayed as conventional (not animated) slides. The remaining 20 or so are animated. The foundation image being either 2000X1500 or 3000X2200px – (depending on the degree of P & Z) Until yesterday, that is before the last 50 slides were added, “Preview” and “Preview from current slide” worked normally. Now they don’t. On a couple of occasions in the past, even with comparatively few slides, “Preview” has failed to work. Shutting PTE down and restarting restore, would then, the function. I have made an .exe file. It works fine, excepting that the Escape key doesn’t do its thing. The project file is 528Kb The .exe is 530Mb I intend (hope!) to rework this project when V.5 has additional transition effects. My questions are: a) Is there a maximum V.5 project size? If there is, have I exceeded it? c) If I want to split the project into 2 parts, can it be done without losing the existing relative transition points on the Timeline of the Keypoints controlling the slides that have been animated? John