There are all sorts of ways to rotate layers in Gimp. In Gimp 2.10.6 (and later) the measure tool can be used.

Is it any better than other tools, not really, just an alternative but worth knowing about.

   

This video demo: 2 and a half minutes shows the tool in action.





Direct link: https://youtu.be/J0lqJ3OJePE

I installed the most recent version for 2.8 (http://liquidrescale.wdfiles.com/local--..._setup.exe), from the wiki, which works but is missing icons.

What can be done about it ?

   

I am posting thit to Gimp 2.8, because for some reason the option to post a thread is not available for me at the Gimp 2.10 section. (edit: moved for you)
My GIMP version is 2.10.6.x

Hello everyone,

first, I am happy to be (new) here and looking forward to meeting people who can help me with my GIMP questions. :-)

I have the following issue with the .png I added (logo_zachramnelesy_web.png). Most of the image is filled with various shades of green. I want all of these shades to become white (all the pixels the same color), and all the other pixels, transparent. The picture only has one layer.

I do the following:
1. Color select with a threshold of 50. I click on the background part of the image. Pixels get selected.
2. I click Delete - all the selected pixels have gone transparent (or so I believe).
3. Ctrl + I to invert selection. I want all the now selected pixels white and only white.
4. Bucket fill, with settings Mode = Normal, Opacity = 100, Fill type = FG color, Affected Area = Fill whole selection.
5. Click anywhere in the current selection. Most of the selection gets filled with clear white. But, some pixels on the edge only get gray. And, some pixels outside of the selection get gray as well. (after first bucket fill.png)
6. If I click again and again in the current selection, gradually all the pixels within the selection get clear white, but also some pixels outside of the selection are affected and get almost white. (after fifth bucket fill.png)

I don't understand how bucket fill with the setting "Fill whole selection" can affect some pixels within the selection differently than others within the selection, and affect pixels out of the selection.

I will be grateful for any help.

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Often when I put a document on the photocopier for scanning I don't get it exactly level for various reasons. How ca I straighten it out in GIMP? If I can't get it aligned right my cropped  image comes out skewed. See the two attached examples.

I have an old print that has some kind of damage on it which looks like a scattering of little red blobs.  The red blobs don't completely obliterate the image underneath, but rather they change its color.  I'm familiar with the technique of filling in missing portions of the image using nearby regions with the Heal tool.  But in this case it seems like I actually have image content in the blobs, so it seems like I don't want to replace the pixels, but rather adjust their color.  I'm wondering if there's a way to do that.   I have attached a section of the image (at full resolution) showing the blobs which are very obvious across the grass and less evident, but still visible if you look on the subject's pink shirt and neck.  

   

How would you go about doing this?

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Hello,

Keep in mind that it's the first time ever that I'm using GIMP; so I've no clue how one would routinely use any basic function.


So, I want to change the color of pixels in an area of a picture from some kind of brown/purple to black. I selected the area. I opened color/map/exchange color. I selected a sample pixel of the color I want to change to black in "from color". Black is already preselected in "target color" by default. 

Then, what do I do to actually exchange the colors? I clicked on "apply" but the "exchange color" window just closed and nothing happened in my selection. The manual explain explains how to select the origin and target colors, as I wrote above but doesn't say how you actually apply the change.

Thanks in advance.

I recently moved up to the AppImage of 2.10.8. Clicking on an ARW (Sony raw) file no longer brings up Nufraw as it did in earlier releases of 2.10.

Gimp: 2.8
Windows 7

This is driving me stupid.

If I drag a text box over my image, but then realise I've forgotten to do something (erase a line / add a line / whatever) and click on a different tool (eraser / pencil / whatever) I'm left with a yellow box of 'walking ants' where my text box had previously been. With that there I can't do anything with my file (can't erase, can't draw, nothing).

For obvious reasons the first thing I did was go to Select and choose 'None' but this didn't get rid of it.

How on earth do I get rid of this dotted border so that I can continue working on my file?

Thanks in advance.

I have several pictures both in my personal users\username\gim2.8\patterns folder  and in the patterns grid/list.  I am now attempting to add three pictures (png,jpg) to that  list.  They do appear in the personal pattern folder all right but refuse to enter the pattern grid.  I have used the green refresh button with no result.  What can I do?