Hi Paul
Have you tried File – Project Properties
Input the desired frame size and frame rate (it can also be 25.000 PAL)
Don’t forget to Apply before OK

I know that I still have a laptop somewhere with V10. As soon as I find it, I should be able to confirm this.
I’m going on memory here….
Cheers !
PC Win 10 Pro 64-bit 16gb Intel® Core™i7-2600k Quad Core 3.40GHz
Cameras: Canon XF305 + Canon XH-A1
Blackmagic HyperDeck Studio Mini
Vegas Pro 14
\’\’When the cutting stops, the editing begins…\’\’