The editor: fix the shot, don't reroll it.
The web editor is what turned Midjourney from a slot machine into a tool. Three moves — inpaint, outpaint, retexture — let you fix an almost-perfect image instead of gambling for a new one.
Inpaint — fix one region
Brush over the part that is wrong (a mangled hand, an odd object) and describe what should be there instead. Midjourney regenerates only that area, keeping the rest of your image intact. This is the single biggest time-saver in the whole app.
Outpaint — expand the canvas
Extend the image beyond its original borders — turn a square into a banner, or reveal more of a scene. The model invents new content that matches the existing lighting and style, so the seam disappears.
Retexture — re-skin the same shapes
Keep the composition and geometry but change the material or style — the same product rendered in chrome instead of matte, or a sketch turned photographic. Great for exploring finishes without losing a layout you like.
Generate to get close, then edit to get it right. Most professional results are an upscaled image plus two or three inpaint passes — not a single lucky prompt.