I'm in the process of making screen pictures to my Mac. Rather than cropping my pictures to 10x16 (the screen proportions, 1600 by 2540 pixels actually) in the photo persona I decided to use slices in export persona, since this would enable me to export in other formats, resolutions and croppings in the future.
So after developing the raw picture and adding an extra layer for retouching I switch to export persona and draw a slice with the slice tool, entering exact proportions of what's effectively a crop. I rename the slice ensure proper format (jpeg high quality) and add proper resolution (1600h actually) and export this slice only . Embed metadata checkbox checked of course.
The picture itself comes out exactly as I planned it, but when I check there are no metadata.
As a sidecheck I exported the same picture with File | Export and also exported the slice, if that is the word, which appear to be automatically created by export persona. Both times metadata was exported as it should. Well actually some metadata was lost, but I believe this to be an import issue (research continues).
For this I used Affinity Photo 1.8.4 on MacBook Pro 13 inch 2017 running Catalina 10.15.6
Delfinhopp_EOS_760D_20-08-07_2851.afphoto
EOS_760D_20-08-07_2851.CR2
EOS 760D 20-08-07 2851.xmp
