Thanks for your reply, more drawing tools will be great thank you.
The horizontal/vertical measuring tool is an excellent tool if I am looking for lets say the horizontal distance between 2 points that may not be the same distance above the ground or for instance for stride length, where I don't want to measure the path travelled but only the distance over the ground, see image.
For the angle between 2 lines tool the other package I have used has a button for this tool which puts 2 lines onto the screen with the abgle between them already calculated, you can then drag the end of these lines to the points you require & the value changes in real time. In this way you don't have to tell the tool which lines to measure, they are pre-defined. Again this I would use when looking at gait to give the relative displacement between pairs of legs.
Will have a play with the image overlay tomorrow as only just got home tonight.
I know the export to a file thing is a bit of a cheat & a low priority and it doesn't really matter, just makes it easy to create a standard/corporate image and of course it makes it harder to forget pages.
Many thanks for your response & can't wait to see the next version.