How to Edit Just One Part of an AI Image — Without Redrawing Everything

ImageFactory Engineering · Published 2026-06-17

To fix just one part of an AI image, don't regenerate the whole thing — use a method that touches only that area or only that element. There are five common approaches: ① masking (inpainting) ② anchor (position) instructions ③ pixel/coordinate instructions ④ percentage instructions ⑤ separating layers and moving the element directly. Below is how each works, with prompt examples and limits — and finally, moving elements by drag and drop.

Why editing "just one part" is hard

Most AI image tools regenerate the entire image from scratch for any edit. So changing one logo's position also shifts colors, textures and other elements — and the more you repeat it, the further you drift from the original.

The key is to avoid full regeneration and narrow the scope of change. Each method narrows it differently — by masking an area, by pinning a position in words, or by separating an element and moving it directly.

Method 1. Masking / inpainting — "redraw only this area"

The most precise way to edit a part. You paint a mask over the area you want to change; the model regenerates only inside the mask and leaves everything outside as the original pixels. This is called inpainting, or generative fill.

• Tools: You need a model/tool that supports masking (Photoshop Generative Fill, Stable Diffusion / Flux Fill inpainting, DALL·E edit, etc.).
• How to: Select the area as a mask, then write an instruction only about the masked region — e.g. "replace this area with a blue button".
• Pros: Everything outside the mask is preserved — best for replacing content.
• Limits: Only works in tools with masking, and the mask edge can blend awkwardly.

Method 2. Anchor (position) instructions — "put it below the main header"

Instead of coordinates, you describe the position relative to an anchor inside the image. This is the most natural fit for conversational image models.

• Prompt examples:
  • "Move the logo to the top-right corner. Keep the other elements, colors, and layout exactly the same."
  • "Place the CTA button centered, right below the main headline."
• Tip: Adding "appears only once, do not duplicate" reduces the common failure of the same element showing up twice. For a deeper guide to wording edits, see Editing one element without everything else changing.
• Limits: Results vary with how well the model understands spatial language. With full-regeneration models, other parts still shift slightly.

Method 3. Pixel / coordinate instructions — "put it at x=120, y=340"

You specify exact pixel coordinates or a bounding box.

• Prompt example: "Place the logo at x=80, y=60 pixels from the top-left."
• Pros: The most precise in theory.
• Limits: Most general conversational models don't follow raw pixel coordinates well. They tend to treat the numbers as "something to draw" rather than an instruction — so it's less accurate than you'd hope in practice.

Method 4. Percentage (relative position) instructions — "at 80% width, 20% height"

You specify a relative position, independent of resolution.

• Prompt example: "Place the headline at 50% width, 15% height (top center)."
• Pros: Applies at the same ratio across different image sizes.
• Limits: Like the pixel method, accuracy drops with full-regeneration models.

Method 5. Separate layers, then move directly — "lift the element out and move it"

You split the image into separate layers and move only the element you want. This is the classic approach in design tools (Photoshop, Figma) when the layers are still live.

• Pros: The moved element isn't regenerated, so it keeps its original quality, and nothing else is touched.
• Limits: An AI-generated image is usually a single flat image with no layers, so you'd have to cut out each element and patch the gap by hand. That said, a tool that automatically extracts and separates elements from a flat image (a layer-aware editor) lets you skip that manual work.

How ImageFactory does it — treating a flat image like layers

ImageFactory brings the benefit of method 5 (direct layer moving) to AI images automatically. It treats a generated flat image as an editable canvas of recognized elements, so you can move elements with drag and drop alone — no masking, no prompting.

① Select an element — click the logo, text or button you want to move; major visual elements are recognized.

② Drag to move — drop the selected element where you want. The moved element isn't redrawn, so it keeps its original quality, and the spot it leaves is filled to match the background.

③ Resize — stretch or shrink the layer area to match both position and size.

To do the same in another AI, you'd typically have to prompt like this:

Move the logo to the top-right corner.
Keep every other element, color, and the background exactly the same.
The logo must appear only once — do not duplicate or redraw other parts.

Even then, full-regeneration models may shift other parts or duplicate elements. ImageFactory moves the element directly, so this step isn't needed at all.