I've been trying now for over an hour to crop an image, unsuccessfully.  I have a large image of a single layer. I need to crop 19 pixels from the left and right edges.  I've read https://docs.gimp.org/en/gimp-getting-unstuck.html and gone through each item carefully there: none apply.
I've drawn my massive selection rectangle which in the selection tool shows as being at position 19, 0 and size 6562x1050.
It looks like "the marching ants".
The layer is not locked.
There is only a single image layer, of an RGB JPEG.
I opened the Crop tool, thinking this put me into crop "mode".
I used rectangle select, and the Mode is Replace.
When I hit Enter, nothing happens; when I double-click the cursor inside the selection, no crop happens: all that happens is during the double click, the "+" of the cursor (with the scalpel icon hovering below and to its right) gets a box with 4 quadrants flashed up around it.
I thought that by selecting the crop tool, and then making a selection, that I activated the crop tool by double clicking inside the selection or hitting enter.
While writing up this question, I hit on the idea of *not* making a selection and instead drawing a rectangle with the crop tool.  Double-clicking inside that worked.  So I used Undo, carefully sized the rectangle created by the crop tool, and then did the double-click.
I still have no idea how you make an area that you've carefully defined by selection, get cropped, but at least I have the result I wanted, albeit two hours after I started.

GL only improved by 777 positions today, but it's Tripple 7 so I got all superstitious and designed 
Tripple 7 Jackpot Slot machine win design
Quite happy with the result.


I also shared the image as Public domain image and the base image before cylinder map and .xcf here:Public-Domain-Images/Jackpot-Tripple-7-Slot-Machine

I have an image that has low quality as the result of jpg compression and/or other whatnot.

If I want to paste something else onto that image, what can I do to make the new stuff match the low quality of the bad image?

Is there some filter? Is there a particular pattern for those filters? An extension? An exporting trick?

i really need some help, so I needed to blend a image to my main background it all went well until i had use the eraser to remove the parts i didn't need (the image isn't easy for me to just crop) basically when i went to remove the parts i didn't want as soon as i erased them wee/tiny black lines like [ - - - - ] appeared on the parts i tried to remove , any idea on how i can fix it. thanks.

I went and asked a question on https://webmasters.stackexchange.com/que...er-for-seo
It's my first time asking a question on that zone of stackexchange.
and before i post my question
this spooky screen came up:
   

For a split second, I was like "Ah, ofnuts is preventing me from posting" haahah

Hello, my problems started when I opened a .png file into GIMP. I couldn't use tools like airbrush, pencil, or paintbrush. These also do not show the circle showing where they would be working. I can however use tools like text and the fill tool with seemingly no problem. I do have everything selected and I am drawing within the layer boundaries.

Hello,

I am running Gimp on Mac OS Sierra. However, i'm having quite serios unresponsive issue. Its almost like a crash, where for example you try to export a photo and the buttons become unresponsive and you can do nothing but cancel the window. The only fix is to reload and hop it doesn't occur. Any fixes for this?

Hello,

Just started using GIMP and am trying to get to grips with creating space images. To get my star field I am using the Noise filter but for some unfathomable reason, the 'stars' keep coming out red instead of white. I've tried every reset but nothing helps. I don't know why or how this happened. Can anyone help? I saw somebody with the same issue posted to the old forum in 2010 and a reply suggested using saturation = 0. This has not helped me.

Thanking you in advance.

Hello!

I use GIMP 2.8 a lot and I really like curved text.
However, there is a problem, look at the O.

I've just installed GIMP 2.9.6 on my MacBook.

Can anyone please explain this odd behaviour in the Colour Picker dialog box?

ffffff is supposed to be white!