Photo: Select part of an image, scale just the part that you selected

[F+C]

In PS, you select a part of an image and you can just scale it or do whatever. No other steps are involved.

Can't seem to figure out how to do such a straight forward operation

[walt.farrell]

Can you give us a screenshot of your Affinity Photo window, including the image and the Layers panel, and describe a bit more about what part you're trying to scale?

[F+C]

it's really as simple as that

Open an image

Select part of the image

Scale the part that you just selected.

Looks like you have to "Rasterize" first.

although now it leaves a white line on the edge of the selection for no apparent reason.

This is a 30 sec operation in PS

[walt.farrell]

Just now, F+C said:

Looks like you have to "Rasterize" first.

If you are truly using File > Open, and it's an image (JPG, TIFF, PNG, or raw file of some form) then you should not need to Rasterize. That's partly why I wanted to see a screenshot

If you use File > Open and one of those file types, you will end up with a Pixel layer. If you do something else, then you may end up with an Image layer, and then yes, you would need to Rasterize.

For the white line, I'd also want to see a screenshot to understand what you're seeing.

[F+C]

[walt.farrell]

Thanks.

Zoomed in that far I'm not sure what that line is associated with. Sorry. Perhaps someone else will have an idea.

[F+C]

That line is the bottom of the selection.

Selected

Stretched the section up 10px.

Dd the same thing in PS - no line

[walt.farrell]

I don't get a line like that when I try to duplicate what you've described so far.

I did manage to get a different kind of line, because the gray background is not uniform, and with one of my selections and movements I could clearly see the difference between the gray in the new layer and the gray in the background layer.

I don't think that's what you're seeing, though.

If you'd care to save it as a .afphoto file and share it here, I can take a further look.

[Lisbon]

On 8/10/2021 at 8:37 PM, F+C said:

although now it leaves a white line on the edge of the selection for no apparent reason.

Olivio Sarikas has a video about extending the background and he mentions this problem that may happen.
He also presents a solution.

Pay close attention at 2:30

Olivio Sarikas: Extend Photo Background | Made Easy - Affinity Photo Tutorial