By A Mystery Man Writer
Apple's Preview program in OS X is great for capturing signatures, but by default these can only be used with Preview; however, there is a workaround to extract and them for use elsewhere.
PDF) Sky-Scope : Skype application traffic identification system
Annotate a PDF in Preview on Mac – Apple Support (AU)
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I have old handwritten (cursive, think Declaration-of-Independence
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Use digital signatures
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Preview has deleted all my signatures, wo… - Apple Community
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