Support
Frequently asked questions and contact information.
What macOS version does CapnMark require?
CapnMark requires macOS 13 Ventura or later.
How do I take a screenshot?
Press Control + Shift + S from anywhere on your Mac. CapnMark will let you drag to select any region of your screen.
Why does CapnMark ask for screen recording permission?
macOS requires the Screen Recording permission for any app that captures screen content. CapnMark uses this solely to capture your selected screen region — no content is ever stored or transmitted.
How do I save or copy my annotated screenshot?
After annotating, use the export toolbar to save as a PNG file or copy the image directly to your clipboard for pasting into any app.
Can I undo an annotation?
Yes — use Command + Z to undo your most recent annotation at any time while in the editor.
Does CapnMark collect any of my screenshot data?
No. CapnMark processes everything locally on your device. No screenshots, annotations, or personal data ever leave your Mac. See our Privacy Policy for full details.
How do I blur sensitive information before sharing?
Select the Blur tool from the annotation toolbar, then drag over any area you want to redact. The region will be blurred in the exported image.