Maybe I'm missing something obvious, but here goes.
In Affinity Photo (v2.0.4, Windows 10) after activating the Paint Brush, is there a way to create or modify a gradient fill color so that I can paint with the gradient? It seems that I can't do that unless I've previously created the gradient in the Swatches panel.
All I can see for the Paint Brush are options to set a solid fill color.
Thanks!