What's the maximum size image that the forum software will show without scaling it down?
I thought, in the old software, it was 450px (or 449px?). So I make a habit of trying to make sure any screenshots I post are less than that, so readers can see the full image without having to click on it, and so there arent any artifacts in most of the images.
But I've noticed recently that this doesn't seem to work. For instance, today I posted a 440x223px image. But the forum software scales it down to 310x157px to display it.
Tangentially: everybody should also be aware that images as directly displayed are untagged, even if a profile is embedded in the submitted file. The profile kicks in when you click to bring up the full version.
At least it works that way in Firefox.
This matters mostly to people with wide gamut monitors, but those with standard gamut might want to keep it in the back of their heads.