Here's how:
Crop your screenshots so that they're framed to focus on the object/entity being considered, like in this example for the NPC Jamella:Or this one for the Area Stony Field:
Then go to the page the image is 'about', and make a new comment in the full editor. Then you can attach your cropped screenshot by dragging it into the editor, adding some text, then pressing Submit. You can upload more than one at a time. But guys, please don't upload your screenshot if there's already something similar on the page...
Lastly, if the image wasn't taken by you, please provide full credit or leave a link to the original.
Teebling
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