Hello,
I have one (or two ;)) suggestions:
Function: perspective warp or transformation
1) Keeping the proportions while dragging an anker point of the perspective warp tool.
2) And oppositely not keeping while pressing and holding the shift key.
I like the way how to transform in Affinity Photo without "cmd & T" or "cmd & F".
When I use move tool, I can easily transform. The proportions will be keeped automatically. And with holding the "shift"-key, the free transformation without proportions is possible. A different way compared to other softwares. I like it!
But it is not logical, that this system doesn't work with the perspective warp.
It would be fine, when it would work there in the same way.
I provided a YouTube-Tutorial to the topic "transformation".
Ciao
Jack Bauer
Berlin, Germany
https://www.youtube.com/watch?v=bUm1DY2i_R4