Re: [Gimp-user] setting DPI for Gimp

[Ofnuts <ofnuts gmx com>]

By default, Gimp uses "dot-for-dot" displays (one pixels of image on one
pixel of screen). So the image is displayed with the screen resolution.

You can toggle this ("View>Dot for dot"), in which case Gimp will
display the image as indicated by the image's print resolution (see
"Image>Print size"). This assume that the screen resolution is set
correctly (see "Edit>Preferences>Interface>Display>Monitor resolution").

For more info: https://www.gimp-forum.net/Thread-Image-size-in-Gimp

On 20/01/2021 20:49, Helmut Jarausch via gimp-user-list wrote:
> Hi, since a short time I have a 27inch 4K Monitor which results in 
> 162 DPI.
>
> xdpyinfo reports
>   dimensions:    3840x2160 pixels (602x338 millimeters)
>   resolution:    162x162 dots per inch
>
> rr
> But when Gimp displays something, e.g. a rectangle, reading the
> (displayed) rulers one can read the height and width of the rectangle,
> but using an (external) ruler the displayed image (at 100%) is much
> larger, probably scaled by 162/96.
> Thus, it looks like Gimp still uses 96DPI for displaying something.
> How can I fix this?
>
> Many thanks for a hint,
> Helmut
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