# Edit a selected area Brush or click an area, then change it, erase it, pin a note on it or remove the background. Source: https://infinall.ai/docs/image/edit-a-selected-area Last checked: 2026-10-26 ## What it is These tools change only part of an image. You mark the area with a brush, or click an object and let Infinall outline it, and then say what to do there. ## Who can use it Everyone. Free and Pro both use Markup, Erase, Comment and Remove BG. On a team, editing needs the Editor role or higher. ## Cost Mixed. Markup, Erase, Comment pins and Remove BG use credits. You see the exact price before you confirm, in a chip next to **Apply** or **Send All**. Outlining an object with **Auto-select** is free. A comment pin that only recolours something with one clear colour can be free, and its chip reads Free to a few credits. Nothing is charged if the edit fails. ## Where to find it Select an image on the canvas and choose **Edit** on it. The toolbar named **Image editing tools** opens under the image. The tools are **Markup**, **Erase**, **Comment** and **Remove BG**. The shortcuts are B for Markup, X for Erase and C for Comment. ## Buttons and controls ![The Markup panel of the edit toolbar with the brush, Auto-select, colours, prompt box, Quality and Apply.](/docs/screens/image/edit-a-selected-area.webp) The Markup panel is shown here. | # | Name in the app | What it does | Plan | | --- | --- | --- | --- | | 1 | Markup | Opens the Markup panel. Shortcut: B. | Both | | 2 | Brush | The brush mode of the Selection mode switch. You paint the area. | Both | | 3 | Auto-select | The auto mode. You click an object and Infinall outlines it. | Both | | 4 | Colour | A row of seven colour dots for the brush. | Both | | 5 | Brush size | A slider for how wide the brush is. | Both | | 6 | e.g. add a red umbrella | The prompt box. Say what should happen in the marked area. | Both | | 7 | Attach a picture to this edit | Adds a picture to the edit, for example a logo to place. | Both | | 8 | Quality | Low, Medium or High for this edit. Starts on Medium. | Both | | 9 | Undo last stroke | Takes back the last brush stroke. | Both | | 10 | Clear | Removes all strokes. | Both | | 11 | Apply | Runs the edit. Shows the price chip. | Both | | | Erase | Opens the Erase panel. Shortcut: X. It has **Erase brush size** and **Undo last erase stroke**. | Both | | | Comment | Opens the Comment panel. Shortcut: C. | Both | | | Remove BG | Opens the Remove BG panel with **Quality** and **Apply**. | Both | | | Selection ready | A tag after Auto-select finds an object. | Both | | | reset | Beside Selection ready. Clears the outline. | Both | | | N strokes | A count of brush strokes in the panel. | Both | ## How to change a part of an image with Markup 1. Select the image, choose **Edit**, then **Markup**. 2. Mark the area. Brush over it, or choose **Auto-select** and click the object. 3. Type what should happen, for example "add a red umbrella". 4. Optional: choose **Attach a picture to this edit**, change **Quality**, or pick a **Colour**. 5. Read the price chip and choose **Apply**. ## How to outline an object with Auto-select 1. In Markup or Erase, choose **Auto-select**. 2. Click the object. Infinall outlines it and shows **Selection ready**. 3. To remove a part from the outline, hold Alt or Shift and click that part. 4. To start over, choose **reset**, or choose **Brush** to paint by hand. ## How to erase something 1. Select the image, choose **Edit**, then **Erase**. 2. Brush over it, or use **Auto-select**. 3. Choose **Apply**. Infinall rebuilds the background where the object was. It does not add new objects, people or text. ## How to drop pins with Comment 1. Choose **Comment**. 2. Click the image to drop a pin. A small box opens. 3. Type a note in **Add a note...**, then choose **Done**. **Delete** removes the pin. 4. Add more pins if you like. The panel shows how many steps are pending, or No pending steps. 5. Choose **Send All**. Each pin with a note runs as one step. For a pin, Infinall first finds the object under it. While it works you see Finding the object..., then Object selected. If you would rather edit a round area, choose **Use a circle** and move the **Edit area size** slider. ## How to remove a background 1. Select the image, choose **Edit**, then **Remove BG**. 2. Choose a **Quality** and check the price. 3. Choose **Apply**. The panel says it removes the background and keeps the main subject. ## Options explained **Brush or Auto-select.** The brush paints by hand. Auto-select outlines an object in one click. When an outline is ready, brush strokes are ignored until you choose **reset**. **Brush sizes.** The Markup brush goes from 2 to 40. The Erase brush goes from 4 to 80. **Order of Send All.** Pins run first, then erases, then Markup. **Quality.** Markup, Erase, Comment pins and Remove BG start on Medium. See [quality levels](/docs/image/quality-levels). **Remove BG result.** It can return a plain white background instead of see-through pixels, and very light subjects can lose some detail. ## Limits - Send All runs up to 8 steps at once. - One edit request can cost at most 100 credits. - A comment pin or Markup edit can carry up to 6 attached pictures. ## When something goes wrong | Message in the app | What it means | What to do | | --- | --- | --- | | No confident selection | Auto-select could not find a clear object. The full message suggests another point or the brush. | Click a different point, or use **Brush**. | | Coordinates out of image bounds. | The click was outside the picture. | Click inside the image. | | Auto-select needs an image with native dimensions. | The image has not finished loading. | Wait a moment and try again. | | Auto-select failed | Auto-select could not run. The full message says it falls back to the brush. | Use **Brush**. | | Too many steps (N). Cap is 8. | You have more pending pins and strokes than Send All allows. | Remove some, or run them in two rounds. | | Could not upload that picture. | The attached picture failed to upload. | Try again with a JPEG, PNG or WebP. | | The image service refused this for safety reasons. Nothing was charged. | The safety system refused the edit. | Change the request. | | Couldn't edit this image. | The edit failed. | Try again. Nothing is charged. | ## Questions ### Is Auto-select free? Yes. Outlining an object does not use credits. The edit you run on it does. ### Why is my Remove BG result white and not see-through? Remove BG can return a plain white background. Very light subjects can also lose some detail. ### Can I undo a stroke? Yes. Choose **Undo last stroke**, or **Undo last erase stroke** in Erase. **Clear** removes them all. Esc clears a selection. ### Can the edit change the rest of the picture? Markup, Erase and Remove BG are meant to change only your area. A Comment pin with no outline changes the scene based on its note, so describe it clearly. ### How do I go back? Every edit keeps the old version. Choose **Use this version** from the **Image actions** menu. See [versions](/docs/studio/versions).