How to Capture a Trackpad Signature on Mac (2026)
Capture a real handwritten signature with your Mac trackpad and drop it into any screenshot or PDF. Free, on-device, no iCloud. Step-by-step with Pizazoo.
macOS Preview can capture trackpad signatures too, but only inside Preview’s sandbox and tied to iCloud sync. If you want a signature you can drop on any screenshot — not just PDFs in Preview — here’s how.
Step-by-step
Step 1 — Open Markup on any screenshot
Open any screenshot in your Pizazoo library and press Return to enter the markup editor.
Step 2 — Pick the Signature tool
Click Signature in the markup toolbar. If this is your first time, Pizazoo prompts you to draw your signature on the trackpad.
Step 3 — Draw your signature
Press and draw with one finger on the trackpad. Tap any key to commit, Escape to redo. Pizazoo crops the signature and saves it locally to your library.
Step 4 — Drop it onto the screenshot
Click where you want the signature to appear. Drag to reposition, drag the corners to resize, use the opacity slider to fade it for a watermark effect.
Step 5 — Save or export
Press Save to write the signed version into your library beside the original. The original screenshot stays untouched.
Where is the signature stored?
Inside the Pizazoo library on your Mac. It never syncs to iCloud and is never uploaded.
Can I capture multiple signatures?
Yes — you can store as many as you want (full signature, initials, "void" stamp) and pick which to drop on a given screenshot.
Does it work on PDFs?
You can import a single PDF page as a screenshot, sign it, and export. Native multi-page PDF signing is on the roadmap.