Step by step
- 01
Capture dark ink on light paper
Good contrast makes the edge clean. Avoid a desk or notebook line crossing through the signature.
PDF SIGN & SCAN / 01 - 02
Remove the paper
Use the After preview and adjust Paper Cleanup until the checkerboard shows around the ink without breaking thin strokes.
PDF SIGN & SCAN / 02 - 03
Save the signature
Auto Crop trims unused space. Name the result so it is easy to find later.
PDF SIGN & SCAN / 03 - 04
Export as PNG
In the signature library, open the actions menu for that signature and choose Export as PNG.
PDF SIGN & SCAN / 04
Check the PNG before using it elsewhere
- A transparent background should not show a white rectangle when placed over a colored area.
- Store the PNG carefully: anyone with the file can copy the visible signature image.
- A transparent signature image is not the same thing as a certificate-based digital signature.
Questions
Why does PNG matter?
PNG can preserve transparency, so only the ink appears when the image is placed over a document. JPEG cannot preserve a transparent background.
Can I choose black or blue ink?
Yes. The signature cleanup controls let you save the result in black or blue.
