Thanks everyone for your help. I checked out the Picasa site as suggested. These are the files supported by Picasa as stated on their website For general playback in Picasa: .mpg, .mod, .mmv, .tod, .wmv, .asf, .avi, .divx, .mov, .m4v, .3gp, .3g2, .mp4, .m2t, .m2ts, .mts, .mkv. For several of these file types, the correct software is required for playback. In PTE this morning I published ny slideshow using 'Creating HD video for PC and Mac. It saved it as mp4 file. It was a success as it appeared in the Picasa folder and I was able to load to my Picasa web a;bum. I will now try the different dpi presets and different quality setting to get a smallish file for my purposes. Thanks for the help. PS What type files do other PTE users publish in for web sites