Edit the visual while the post is still a draft or scheduled item. Open the post, locate its image, open the image options—usually the three-dot menu—and choose the advanced editor. Apply the required crop or adjustment, confirm the editor, then save the post.
Review every selected network preview after editing. Ratios and safe areas differ, and a manual crop can hide text or a logo on one destination. Keep an untouched source file outside Nonli so you can restore the visual if an edit is unsuitable.
A post already published on a social network usually cannot have its media replaced through the publishing API. In that case, decide whether to keep it or delete and republish it, accounting for lost engagement and duplicate risk. If the editor is blank, test a supported browser with hardware acceleration and provide support with browser version and a cropped screenshot.