ChrisRob

Excellent, changed to brush blend mode to normal and it's working now. Must have changed that by mistake. Many thanks 🙂

Hi Nathan, confirming Protect Alpha is unchecked. Here is screenshot with brush selected. Thanks for your quick feedback. Printscreen brush.docx

My paint brush has stopped working on masks, normal or inverted. I don't believe I've unintentionally changed any settings. Paint brush works just to paint, eg black. Can I uninstall Affinity Photo and download again to try and resolve the problem? Your help please.