Thanks for the workaround, @toltec. I tried it and it works. I do want to use the selection as a clipping path to drop out the background on a placed pixel image. After several failures (when I tried to delete the inverted selection, the entire image disappeared) I discovered that the placed image has to be embedded. My placed image was a jpeg and apparently you can't embed a jpeg(?). When I tried it with a PSD image, it embedded and I was able to do my editing. As far as I can tell, the Affinity documentation doesn't say anything about this re. jpegs. Anyway, I achieved what I was trying to do and thank you very much for your help.