i try to place guide lines in centimeters (cm) or millimeters (mm) but that doesn't work
i have been working with gimp for a long time on an amateur basis but i never knew how to set it. yes on precent but not on mm or cm
how can this be solved?
software of gimp is 3.0. 2 and runs on a windows 11

Hey hello. I've been using gimp 2.10.2 for a very long time. Just recently now updated to 3.0.2.

When used to work with older version, I used to paste lots of sub-images into the main one, to then right click in any empty space from main image to keep modifying pixels or adding up more sub-images, but here in v3.0.2 after pasting first sub-image, I get some small black lines which indicate to be the limit from new recently made "layer".

In v2.10.2 I didn't use to have this problem. Its not like there were made new "layers" when posting new pixels or sub-images to main image. I know there is a command named as "Merge down", but would like to know if there is some option to keep the same old behavior I used to have in older GIMP version.
It would be tedious to be pressed Merge down each time to add up a new sub-image to each one of the files that have to modify.

Dont know if its called other way around to make it automatic, so sorry about ignorance and thanks a lot in advance.

Hi, I am in GIMP 3.0.2 on mac book, works perfectly, I need to add to a selection, the search says To add to a selection in GIMP, hold down the Shift key while making a new selection with any of the selection tools, and the new selection will be added to the existing one.
I hold Shift and nothing happens, I think these searches are not made for mac. Thank you

I am a novice. 80 years old.

i have a base image and a transparent layer over it.
In the transparent layer i have drawn, with a pencil tool, one line.

i would like to move that line. i have been unable to achieve that goal.

my experience:
* learned that the move tool is not appropriate tool.
* clicked on transparent layer with one line, thus making that layer active
* selected the line
   * by using the rectangular selection tool.
   * wondered if i had just left clicked on line if that also would have selected the line
      as the line was the only object in the transparent layer.
* moving selection with method one:
    * after rectangle appeared around the selection
    * placed cursor inside rectangle box but NOT within the handles.
    * left clicked and dragged the selection upwards. the frame
       moved, but not the contents.
* method two
    * after rectangle appeared around the selection
    * went to edit in task bar and clicked on copy (also tried ctrl c)
    * moved cursor to a new location
    * in edit clicked on Paste (also tried ctrl v)
    * nothing happened. if i had clicked on "CUT" the line would have disappeared.

Please help me understand what i am not doing or doing incorrectly.
bil

ps.
Tried to attach the file. it was too large. BUT THE SYSTEM WOULD NOT ALLOW ME TO DELETE THE ATTACHMENT SO I COULD
SUBMIT my question. am i missing something?

I have been trying to remove background from a few photos, but I cannot do it. I have tried Fuzzy Select tool, the paths tool, and the free select tool, but I cannot do it. Each time, the background turns into a beige color.

Hi! 

Is it possible to export tiff 16-bit files?  I'm trying to upload astrophotography photos into Sequator.  Error received: Sorry, can not handle images with 32-bit samples (in module "image")


Per Sequator manual: RAW files are recommended. If you use TIFF instead, do not alter the linearity of data. Any processing except vignetting correction should be avoided. Sequator accepts uncompressed 16-bit TIFF.

The images were shot in raw, opened in Raw Therapee to start some edits and then the image transfers to Gimp but I'm not seeing how to export as 16-bit tiff.  

(Raw format files accepted are .cr2, .cr3, .nef, .arw, .rw2, .orf, .pef, .dng.  I don't see options for exporting as any of these extension either)

TIA

I'm wondering if anyone else is having trouble with using the select tools.

I was working on an image and using the rectangle select tool and after making a rough selection I went to adjust the position in tool window.

However in selecting the x position or the width in number boxes one of two things happen either it simply refuses to change the number and it just stays selected, or it changes the zoom on the image instead of adjusting the position of the selection.  It happens with a roughly 50-50 split between doing nothing or zooming in and out.

Note the + and - buttons work as expected.  As well there is no problem changing the y origin or the height of the image.

This happens for me with 3.02 and 3.03.  The image below is an animated gif of the problem clicking on it should demonstrate the problem.

After playing with this a bit more it seems double clicking inside the position box to select the number does not give the box focus, and thus entering any of 1 to 5 sets the zoom level to the level associated with that number.

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Where goes America (?)


   

                                    His Majesty Donald 1

I'm a simple user of image editors, unfortunately it appears you have to be a professional editor to even attempt to use Gimp.

What I do is crop, resize, draw text, draw arrows from a to b (text to subject of text).  Everyone seem to recommend brushes, but from my attempts that is not possible, for starters you don't define 'a' & 'b" and can't change the length.  All of this is relatively trivial in Paint.Net and some other editors, I just thought I'd try GIMP out.  I have looked for and failed to find much in the way of tutorials on any of the basics.

Am I missing something? Or is it not possible to draw arrows (a modified straight line with arrow head) in GIMP?

Unclear if this question should be posted on a gimp forum or an xnviewmp forum.  Because there may be an obscure gimp setting, I am trying this gimp forum first.

I just installed Linux Mint 22, and then xmviewmp 1.8.7 64-big (Linux) - Libformat 7.220 and then gimp 2.10.36.  Then, I used xnviewmp's open with : configure : gimp facility to start gimp from inside xnviewmp by right-clicking on an image.  Doing this, gimp opens the image okay, but has an annoying popup message "Opening /home/steve failed : Not a regular file."  I have unsuccessfully tried variations of the [ xnviewmp : open with : gimp ] facility.  For example, if I instead specify gimp.sh, which contains the command gimp-2.10 %U, xnviewmp does nothing.  Alternatively, if I xnviewmp-configure gimp to start with the %U option, then I get two popup error messages. 

I would like to find a gimp setting (or alternatively a xnviewmp setting) that will prevent any such popup message.  Before posting, I attempted to research the problem.  I found similar postings that were not exactly on point.  I did notice that responders were interested in gimp's interaction with bash, so I experimented: 

• When I start gimp, by itself, with the icon-command = gimp-2.10 %U, there is no problem opening/manipulating images.
  
  
• When I open a bash termimal and execute gimp-2.10, again there is no problem.
  
  
• However, if (instead) I open a bash terminal and execute gimp-2.10 %U, then I get the error message: "Opening /home/steve/%U failed: Error opening file /home/steve/%U: No such file or directory",