Thanks, everyone, for your replies. I appreciate the help. Having read the rather skeletal manual I can see why there are so many tutorials by users. That was something I didn't know about when I decided to give PTE a trial. I have a long computing history (starting with programming in Fortran for engineering back in the 1960's up to teaching programing and coding in Modula2 in the 80's to these days as a more general user) and generally pick up new things quickly. For this project I was asked last Friday to set up the slideshow for a project vaguely related to my work. It is due Tuesday, tomorrow. I went looking for slideshow software on the weekend rather than do it in After Effects, which I have on my work computer and used for a short movie project a couple of years ago. I figured slideshow software would have templates for the format I was looking for, as well as automatically generate photo frames etc. PTE is the most sophisticated of the apps that I trialled (the others were 'pretty' rather than functional), but it is let down by the manual. The skimpy manual also camouflages the functionality of the program. Perhaps they should add in links to your unofficial manual and tutorials. After Effects has layers as well as parent/child linkings, and I'm familiar with the different between them in that application. But that doesn't mean that the same difference appears elsewhere, hence my need for clarification. AE is also keyframe controlled so I'm familiar with their use, although the implimentation in PTE is somewhat different. Thanks, Lin, for the recent post. I can see it's back to school as I work through the tutorials. And to bbdigital, that demo is the kind of project we are setting up, but without music or text. The deadline for the project got moved today to a rehearsal on Saturday, final event on Sunday. It's all up and running. Kim