I’ve encountered plenty of things you just flat out can not do in gimp. The latest one is you can’t highlight text. Something incredibly basic that other programs have had since the 90s.
(7) Align screenshot layer with the new-from-visible layer.
(8) Difference layer mode.
(9) If the selection did not fit on screen, duplicate the new-from-visible layer.
(10) Merge down.
(11) Select the selection box with the fuzzy select tool. (You may need to delete the regions of the merged layer that represent the GIMP UI to do this.)
(12) Select → Remove Holes.
(13) Invert selection.
(14) Delete.
(15) Invert selection.
(16) Delete.
(17) Fill (with a block colour of your choice).
(18) Hide the layer, then goto step 2 until all of the selection is accounted for.
(19) Merge all the block colour layers together.
(20) Re-order the block colour layer under the text layer.
(21) Reduce opacity to taste.
See! It's theoretically possible to assign the desired pixel values using GIMP, therefore GIMP is perfect and has no problems at all. In fact, you can automate this with a very simple combination of AutoHotKey and Script-Fu (passing control data from Script-Fu to AutoHotKey using PixelGetColor), which is practically as good as having it built-in.
(More seriously: you can probably do gimp-vectors-new-from-text-layer, segment it into glyphs, take only the glyphs within a selection, split those into lines, find bounding boxes for those lines, and fill them with the current foreground colour, but there appears to be no way to query the current text selection from Script-Fu, so you'd have to use this with the Lasso selection tool or something.)
Create a transparent layer. Paint on it in a colour of your choice. Set layer mode to "darken only" or "lighten only" depending on your background. "Difference" is fun too.
I've been using GIMP for longer than I care to remember and I am painfully aware of what is not great in its UI, which is something that seems to have gotten _worse_ over time. This isn't one of them; to paraphrase, that's just knowing how to use basic features that GIMP and other programs have had since the 1990s.
That’s not what I’m talking about. I wanted the same effect as you get on MS Word when you highlight text. Creating a coloured background behind the text. It’s a pretty common effect on posters and similar things.
The best you can do in gimp is fill the entire text box background, but that doesn’t look good at all on multi line text where you want it to fit each line properly.
Sound like nonsense. You can clearly select text from text layers, which is what you get when you write text on a picture. I think you are ptobably describing something else and need to be more specific about what you mean by highlighting.
