Working with vectorized images that typically contain way too many paths, I'd like to be able to
Drag swatch A on top of swatch B to replace all visible instances of fill A with fill B
Click on swatch A to select all objects using fill A
If there's already a way to get the same result, my apologies: I'm an infrequent user, and can't seem to keep up to date with the ever-expanding capabilities of Affinity Designer & Photo.