> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mago.studio/llms.txt
> Use this file to discover all available pages before exploring further.

# Modify frame

# Modify Frame Workspace

[← Render Video](/guide/workspaces/render-video) · [Workspaces](/guide/overview#the-five-workspaces) · [Next: Mask →](/guide/workspaces/mask)

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Modify Frame is the image generation workspace. It edits or stylizes single frames using image-to-image models, and it's the **recommended starting point for almost every video workflow**.

<img src="https://mintcdn.com/mago/oXMZB2dFGP4Gkdvd/assets/screenshots/workspaces/modify-frame-overview.png?fit=max&auto=format&n=oXMZB2dFGP4Gkdvd&q=85&s=dafdb432e1c1e27c7dc47bfaca394372" alt="Modify Frame workspace, full layout." width="1679" height="961" data-path="assets/screenshots/workspaces/modify-frame-overview.png" />

## Why Modify Frame first

Validating a style on an image is faster and cheaper than testing on video — a failed image render costs a fraction of a failed video render. The validated image then becomes the reference frame for the video model, producing dramatically better results than prompting the video model blind.

**Strong fit for:**

* Style transfer (apply a visual style).
* Element editing (change a specific thing in the frame).
* Character replacement preparation (generate the new character matching the source pose).
* Environment changes (turn a building into a castle).
* Lighting changes (turn day into night).

## Layout

* **Left** — Settings panel: source frame selector and per-model controls.
* **Middle** — generation history grouped by source frame (collapsed by default; open via the chevron).
* **Right** — live generation feed with the most recent results.

## Source frame selection

The Settings panel lets you:

* Preview a thumbnail of the source video.
* Scrub to any frame, or type a specific frame number.
* Download the current frame.
* Zoom for full-screen preview.
* **Source override** — upload an image to use instead of a frame from the video.

> **💡 Tip** — The source override is useful when continuing work that started in another tool. Edit a frame externally, upload it, and keep iterating in Mago.

## Model selection

Image models are detailed in the [Image models catalog](/models/image-models). Quick guide:

* **GPT Image 2** — best precision for editing. Respects original content closely. Supports a mask image for region-specific edits.
* **Nano Banana Pro** — strong general-purpose results. Good default when unsure.
* **Nano Banana 2** — fast, supports 4K output.

## Prompting

All image models accept **instruction-based** prompts. The most important habit is including preservation directives.

> **Example**
> ❌ Bad: *"castle"*
> 🟡 Better: *"Change the building into a stone castle."*
> ✅ Best: *"Change the building into a medieval stone castle. Keep the original character, composition, lighting, and outlines intact."*

See the full [Prompting guide](/guide/prompting-guide).

## Auto Prompt

Generates a prompt from a description of the source video, the action, and any reference image. **Regenerate** to retry, **Use Prompt** to insert it for further editing. An **Optimize Prompt** action cleans up phrasing in your existing prompt.

## Generation feed

Generated images appear in two places:

* **Right column (live feed)** — most recent results, with timestamps.
* **Middle column (history by frame)** — all results, organized by the source frame they came from. Click a frame group to expand it.

## Per-image actions

| Action            | Effect                                                                                                        |
| ----------------- | ------------------------------------------------------------------------------------------------------------- |
| **Use this**      | Sets this image as the reference for the selected Render Video model. Switches to Render Video automatically. |
| **Iterate**       | Uses this image as the base for a new image-to-image generation. Great for refining a near-miss.              |
| **Load settings** | Loads the model, prompt, and settings that produced this image.                                               |
| **Favorite**      | Marks the image for easy retrieval in long sessions.                                                          |
| **Download**      | Download the image.                                                                                           |

## Comparison

Click any generated image to enlarge it. In the enlarged view, comparison buttons (top-left) enable side-by-side or slider comparison with the original source frame — useful for verifying preservation directives were respected.

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[← Render Video](/guide/workspaces/render-video) · [Workspaces](/guide/overview#the-five-workspaces) · [Next: Mask →](/guide/workspaces/mask)