Hi macian
Yes, I've found the Barry Beckham tutorials, thank you. It was watching his "How It All Works" presentation that I decided to buy PTE AV Studio 11 in the first place. I intend to buckle down and work my way through his tutorials in due course to gain a proper understanding of the application.
Thank you davegee for your further clarifications. Nothing about maths, numbers, or values appeals to me!! Thanks to the kind help of yourself and Jill, I now understand at least the principle of what I need to do. The practice needs a lot of polishing, for sure, but I'm confident that now at least I'm heading in the right direction!
I'm very pleased with PTE AV Studio 11, and even more pleased to discover there's an active forum with many knowledgeable users who are prepared to offer help and encouragement to newbies. I hope you will continue to assist me the next time I have beginner's questions - of which I'm sure there will be many!
Thank you to everyone
Joe