Thank you Admin1, you have just solved my problem. I am a new user of PicturesToExe and was having the same problem of the transition effects apparently not 'sticking'. Changing the interval between slides has fixed the problem, and I can understand how changing the image size would achieve a similar result. However, it seems to me that the timing for the interval between images is inaccurate. To achieve an actual interval of, say, 5s, I have to set the interval in PicturesTo Exe to something approaching twice the desired time, nearly 10s. These figures are estimates, not necessarily accurate, but the discrepancy between the actual time and that set in the program is quite noticeable. Can you, or anyone, confirm the timing set in the program is accurate, or otherwise. Don