Copy-paste slected pixels

[quitenewtothis]

I'm trying to copy a selected area of pixels and use it to replace the pixels in another area of the image, but without altering the original image. Combining the marquee and move tools with copy merged does create a new pixel layer with the selection, but I'm unable to paste it in the "target" area.

[John Rostron]

Isn't what you describe the role of the Clone Tool? It can copy from one layer to another.

Clone Tool video

Clone Tool help

John

[Komatös]

The question is asked in the wrong subforum.

A moderator will move this post to the appropriate subforum.

[Old Bruce]

1 hour ago, quitenewtothis said:

I'm trying to copy a selected area of pixels and use it to replace the pixels in another area of the image, but without altering the original image. 

There is no Paste Replace in Photo or any of the Affinity applications. Copy the selected area. Paste, now you have a new layer which can be moved to where you want by using the Move tool.