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How to size canvas and add and retain full image in GIMP?


Question

I am a GIMP beginner and have successfully created images with my desired transparencies in GIMP. However, I have problems with and can't seem to understand the ins-and-outs of image and canvas sizes.

I have multiple images that I exported from another software program at 8.5x11 (US letter). I create a new image canvas in GIMP (File -> New) and set the size to 8.5x11 (US letter), but when I add my images sometimes the image is cropped (essentially zoomed in) and sometimes it is over-centered (zoomed out). I re-size the canvas successfully but can never get the images to fit correctly. Can someone please clarify the fundamental piece of graphic design knowledge I'm missing here?

I have included a couple of my attempts below. Also, it appears these threads are close to the answer I'm looking for, but miss the mark:

Gimp : difference between crop and canvas size

In GIMP how to scale up image without scaling layers?

Gimp : difference between crop and canvas size

This image was added to GIMP with a canvas size of 8.5x11 inches, just at different zoom levels: enter image description here

enter image description here

2017/04/13
1
5
4/13/2017 12:46:00 PM

As mentioned by thebodzio, you've specified the aspect ratio, but not the size. GIMP has no way of knowing how many pixels are in an inch (ppi), so it guesses.

You can specify the ppi when creating a new image:

enter image description here

Or after the image is created, in Image > Print size:

enter image description here

However the easiest way is to use Fit canvas to layers in Image as mentioned by Paolo Gibellini

2017/04/13
1
4/13/2017 12:46:00 PM