"Image > Print Size" really IS the command you are looking for.
The key is to pay attention to the units-of-measure shown on the Print Size
- The "Width" and "Height" values under Print Size are displayed in real-world
units (inches, mm, etc.), not image pixels.
- The "Resolution" values are displayed in pixels-per-unit.
- You cannot change your image's pixel dimensions (aka scale the image) from
the Print Size dialogue. That's what the "Scale Image" command is for.
Remember the relation between pixel and print sizes is:
(print size) = (pixel size) / (print resolution)
When you change the image's print resolution, of course the real-world size
(the "width" or "height" shown in the Print Size dialog) of your image will
update to reflect the new print resolution -- that value is calculated from
your image's actual pixel size and whatever resolution value you just entered.
This is totally normal behavior -- in fact, it's expected. If you change an
image's resolution from, say, 150 pixels/inch to 75 pixels/inch, this doubles
the print size of your image but only the print size; the image's pixel size
remains precisely the same as before. (You can confirm this by comparing
"Image > Canvas Size..." before and after changing the resolution.)
And as others have stated, if you're using the image for Web viewing then its
print resolution has absolutely zero effect on how it will appear onscreen
(print resolution only affects, well, actual printing), in which case you'll
want to use the "Scale Image" command to actually scale your image larger or
Numbers may not lie, but neither do they tell the whole truth.
Subject: Re: [Gimp-user] Resolution
Date: Fri, 14 Dec 2012 19:13:59 +0000
Thanks...but when I change the picture size the resolution
and when I change the resolution the picture size
There does not appear to be any way to unlock the
This is in image > print size
From: Richard Gitschlag
Sent: Friday, December 14, 2012 5:58 PM
To: leon.white...@ntlworld.com ; firstname.lastname@example.org
Subject: RE: [Gimp-user] Resolution
It's under "Image > Print Size...".
not lie, but neither do they tell the whole truth.
14 Dec 2012 17:27:35 +0000
Subject: [Gimp-user] Resolution
Is there a way to change the resolution of a picture without
it changing the size.
I cannot find a way to separate the two..
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