I am very inexperienced in Affinity but used to know photoshop very well.
I am trying to take a photo from Aperture (no problem there),
Select a central(ish) part of the image - the part I want to keep,
Feather the edge around the part that I want to keep,
Delete the rest of the image/document (don't mind which)
Convert the remaining feather-edged part of the image to greyscale (no problem there)
I am;
Selecting the central(ish) part of the image that I want to keep,
Selecting "inverse pixel selection" - the marching ants look correct
Selecting "cut" to remove the inverse selection
The whole image is cut leaving a blank canvas.
What is really annoying is that I have done this successful (albeit after several retrys) twice today and now I can't get it to work at all.
I don't need a non-destructive method for this part and what I have done is what I would have done in Photoshop.
Can anyone tell me what I am doing wrong (or right on some occasions)?