Put it into practice
- Set the intended output frame.
- Review the selected export scale.
- Inspect the downloaded image's width and height.
What this looks like
A 2× export has twice the width and height of the selected base frame.
A detail to keep clear
Doubling both dimensions produces four times as many pixels, not twice as many.
Using MockupX
MockupX exports PNG and JPEG, with WebP and 2× output available to Pro accounts. Export requires sign-in, and free exports carry a watermark. A transparent background remains transparent only in a format that supports it. Inspect the downloaded file, not only the editor preview.
Check the result
Keep the original screenshot, then review the exported file at the size where people will see it. Check the message, the visible interface and the final crop separately. For a handoff, record the destination and the approved file so another person can distinguish the final version from a draft.
References and further reading
Use the official references for format behavior and current destination requirements. The composition advice above is a practical design approach, not a promise of platform approval.
MDN image formats ↗