Long-press shortcuts are super useful in other apps such as Photoshop, really help to speed up workflows, and I thought it might be a great little addition to Affinity apps too.
I'm sure you already know what I'm talking about, but just for clarity:
When you use a tool in PS, and press and hold a shortcut for another tool, you can temporarily use that tool until you stop pressing the shortcut.
For instance, if you're using the brush tool, you can press and hold "E" to temporarily use the eraser tool, which then automatically switches back to the brush tool as soon as you stop pressing "E".