Thanks for the suggestion – that only matters, I think, if you the clips are not rotated or don’t have their size reduced. It’s when you are trying to fill the screen with a source clip of a different ratio.
In the “pan and crop” tool in Vegas there are options to choose “match source aspect” and “match output” aspect – these options apear when you right click on the videoclio/image and also when you click on the frame — but no combination makes a difference.
I have attached a screenshot for anyone who might want to take a look – there are settings on the side and maybe its related to those – idk
There are 2 screenhots from the PAN+CROP tool, image no.1 shows the positon of the clip at the start of the animation, and image no.2 is the position at the end, when the image has moved through the frame
It’s weird, something else I can’t identify seems to be limiting the area of the screen where the images are allowed to appear, and the size of the lower horizontal bar changes!