Midjourney Web Image Editor Upgrade: Hands-On Guide to Erase/Restore and Canvas Expansion

The Midjourney web version has recently made “editing” much smoother: you can not only erase and repaint directly on the image, but also expand the canvas and adjust the aspect ratio to fill out your composition space in one go. This article explains Midjourney’s new editing capabilities step by step in a practical workflow—follow along and you’ll be able to use them right away.

Midjourney’s New Editing Entry Point: Go from Generation to Editing in One Straight Line

Open an image you’ve already generated in the Midjourney web version; the common entry point is the “Edit” button on the image. Click it to enter the new editing interface. The benefit of this flow is that you don’t have to keep going back to commands and retrying—Midjourney has linked “generate → local edits → regenerate” into a single step. When you just want minor fixes, the web version is less hassle than constantly switching between variations.

It’s recommended to use Midjourney to lock down the main subject first (for example, the person’s pose, key props, and the lighting direction), and then go into the editor to refine details. This keeps the erase-and-repaint area smaller and makes the output more stable.

Localized Erase & Repaint: Use Erase and Restore to Tweak Details Precisely

The core of the Midjourney editor is localized editing: use “Erase” to remove areas you’re unhappy with, leaving a blank space for Midjourney to regenerate just that part. The most common uses are fixing hands, cleaning up background clutter, changing clothing or accessories, removing watermark-like artifacts, and so on. When erasing, don’t paint too large an area at once—start with small, targeted fixes; the success rate will be noticeably higher.

If you select the wrong area, you can use “Restore” to bring back parts you erased by mistake, then reselect the region. In practice, a rhythm of “erase a little → check the result → erase a bit more” fits Midjourney’s generation logic better than trying to change everything in one shot.

Canvas Expansion and Aspect Ratio: Turn a Vertical Image into a Wide Poster

Beyond local edits, the more practical update this time is canvas expansion: by adjusting the ratio/aspect ratio, you can add space outward beyond the original image. For example, you can expand a vertical half-body portrait into a horizontal cover, letting more complete surroundings appear on both sides and leaving room for a title area or brand information. For people making posters, e-commerce key visuals, or social media headers, this is much faster than regenerating an entire new composition.

When expanding the canvas, don’t add too many new elements in the prompt. Try to describe the direction as “continuing the original scene,” such as “same environment, consistent lighting, extend background.” Midjourney is better at extending a consistent atmosphere; forcing in a new main subject is more likely to make the image fall apart.

Practical Tips: Make Midjourney Editing Feel More Like “Controlled Retouching”

First, prioritize editing things with clearly defined shapes: collars, glasses, streetlights, cloud textures—these are easier for Midjourney to converge on. Second, if you plan to edit the same image multiple times, try to keep the same keyword structure so Midjourney understands you’re “fine-tuning,” not “changing the concept and repainting.” Third, if you find the image drifting further off with each edit, restore to the previous step and redo it with a smaller erase area—this is often more effective than trying to brute-force the prompt.

Overall, the Midjourney web editor turns “generation” into a “generate + correct” workflow: first produce a draft that’s 80–90% there, then use Midjourney to fill in the remaining 10–20%. Once you get used to it, you’ll be more likely to treat Midjourney as a creative tool you can refine repeatedly, rather than a blind-box style image generator.