How to copy a channel and keep the image in place

[Guy Burns]

I have an image that PS that has had it's canvas enlarged with a transparent background (17000 x 8000), then the image was moved around inside that larger canvas.

When I try to copy one of the channels, and paste back as a layer, PS centralises the paste, but I'd like it in the same position.

Another thing I can't explain: when I make the selection, Info tells me the correct dimensions of the entire canvas: 17000 x 8000. When I make the paste, the image comes in at the original size i.e. the canvas extension has been ignored. To check that, I created a new document – which also came up at the original size, and not 17000 x 8000.

Is it possible to copy an channel image that is on a transparent background (a background that is larger than the original) and then paste that back into a layer so that it pastes in place?

[c.pfaffenbichler · Accepted solution]

You could duplicate the Channel and copy that copy, so it will include the whole Canvas. 

[Guy Burns]

Duplicate and copy. Works! Why you can't copy the original I'll never understand.

[lambiloon]

Hi I think you first need to understand more about channels first check the video hope it helps you ..... regards

https://youtu.be/-0dkoFwYTa8