Midjourney Web Editor Upgrade: How to Use Erase/Repaint and Canvas Expansion

Midjourney has recently made its web-based image editor much smoother to use: after clicking into a piece, you can enter the new interface via the “Edit” button and directly make local edits and expand the canvas. For those who often produce posters, e-commerce images, or concept art, the focus of this update isn’t “drawing better,” but “editing better.” Below, I’ll explain Midjourney’s new workflow by feature.

1. Where to access Midjourney’s new editing interface

On the Midjourney web app, open an image you’ve generated. After clicking into the single-image large preview, look for the “Edit” entry on the right side/bottom. Clicking “Edit” takes you into a dedicated editing workspace, where erasing, restoring, and canvas expansion are all done. The significance of this entry is that Midjourney has separated “generation” and “editing” into layers—so you no longer need to route back through Discord’s chat flow just to edit an image.

2. Erase and Restore: local edits feel more like “patching” than re-rolling

The new Midjourney editor provides “Erase” and “Restore.” You can first use Erase to wipe out unsatisfying parts—such as extra text, messed-up fingers, or background clutter—and then let Midjourney regenerate the cleared area to achieve a local repainting effect. If you erase by mistake, there’s no need to panic: just use Restore to revert the area, then reselect the range more reliably.

3. Expand the canvas and change aspect ratio: switching between landscape and portrait is easier

Often the image itself is good; it’s just that the composition doesn’t leave enough “negative space.” Midjourney’s new editor supports expanding the canvas by adjusting the ratio/aspect ratio, essentially continuing to “grow” content beyond the original image. Whether you’re turning a vertical image into a horizontal banner for a cover, or adding breathing room around the subject for a product detail page, you can expand the canvas first and then fine-tune element placement—more controllable than rewriting prompts and re-rolling from scratch.

4. Transform, Enhance, Regenerate: polish a single image until it’s deliverable

In the editing workspace, you can also iterate using actions like “Transform,” “Enhance,” and “Regenerate.” Use Enhance if you want the overall result to look more refined; use Regenerate if you want to try multiple versions under the same direction. A recommended workflow is: first fix major flaws with Erase, then expand the canvas to lock in the layout, and finally use Enhance to elevate the texture and finish—the output efficiency for a single image will improve noticeably.