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

# Screenshot Capture

> Capture full-page screenshots alongside text monitoring

Screenshot capture is a **Pro plan** feature that saves a PNG screenshot alongside each text snapshot when a watch checks a page. This gives you both text diffs and visual comparisons.

## Enabling screenshots

1. Open the [watches list](https://sitespy.app/dashboard/watches)
2. Click the **gear icon** on a watch to open Watch Settings
3. Toggle **Screenshot Capture** on
4. The watch automatically rechecks to capture its first screenshot

When enabled, the watch uses a browser-based fetcher so it can render the page and take a screenshot.

<Note>
  Screenshot capture requires the **Pro plan**. Free and Starter users see an upgrade prompt.
</Note>

## Viewing screenshots

### Preview page

The preview page shows a **Text / Screenshot** tab toggle when screenshots are available. Switch to the Screenshot tab to see the most recent capture.

### Diff page

The diff page shows a **Text Diff / Visual Diff** tab toggle. The visual diff view offers two modes:

* **Before / After** — A slider to compare the two screenshots side by side
* **Diff Overlay** — A generated image highlighting changed regions in red

The change percentage and sensitivity threshold are shown below the image when available.

## How it works

* Screenshots are **additive** — text monitoring always runs, screenshots are captured alongside
* Each check saves both a text snapshot and a screenshot (if enabled)
* At least 2 screenshots are needed before visual comparison is available
* The diff overlay is generated on-demand using image comparison (SSIM)