How to take a scrolling screenshot on Mac

1. Prepare content that can scroll

Open the webpage, conversation or table you want to keep. Wait for images and text to finish loading. Close popovers and banners that cover the content, and identify any personal details you will need to redact.

2. Choose a region and scroll the source yourself

Select a region or window in MellowKit. The first Mac App Store release uses manual scrolling: you scroll the source window while MellowKit captures and stitches the frames. Follow the actual content up, down, left or right, keeping overlap between frames so you do not skip uncaptured content.

3. Review seams and fixed headers

Preview the stitched image for missing lines, repeated content and misalignment. With sticky navigation, lazy-loaded images or animation, pause until the content settles. Undo a segment and capture it again if needed. If a page cannot scroll reliably, use separate captures. Seamless stitching cannot be guaranteed for every webpage.

4. Choose an export format

Save an image for a message or document. For very long content, use paginated PDF or tiled PNG export. Check the size and readability, then add annotations or redact details before sharing.

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