[jraph]

select with a circle shape -> draw selection. Not as straightforward as possible, but still quite easy.

[danuker]

Alternatively, if you want a circle and not a disk, after filling the circular selection, shrink it by whatever thickness, and then delete.

But I have felt no need for drawing circles. Those should be done in Inkscape. I am not sure they should be in a photo processing app.

[gus_massa]

I use Gimp and Inkscape a few times per month, not professionally. But for silly graphics, I prefer Paintbrush[1].

I agree that for complex drawings where you should align multiple objects and be able to adjust the width and other properties of the color, it's better to use Inkscape.

But for throwaway screenshots with a big red arrow or a circle around the part I want to highlight, I prefer Paintbrush.

Is it possible to add to Gimp an option to draw simple forms like in Paintbrush? Perhaps as a filter or a tool. Gimp looks very customizable, but I never went into that rabbit hole.

[1] MS changed the name to "Paint" like 20 years ago, but I never got the memo.

[jraph]

> But for throwaway screenshots with a big red arrow or a circle around the part I want to highlight

On KDE, the Spectacle screenshot tool comes with an "annotate" button that does exactly this. I agree this kind of stuff is very convenient, bonus points with a touchscreen.

[danuker]

I use it to annotate screenshots also. But I have hand-drawn all my arrows and "circles" with the Brush tool.

If you want precision, you could use the "Paths" tool and then trace using a Brush.