Part-1

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Click above button, the signature data will be saved to session (no file/disk or db), after the page post-backs the signature area will get clear


Click above button, the signature data will be converted to image and shown below:



Part-2

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Click below button, to see a previous signature get loaded to the signature area (from server / database). You can continue signing over it.




When the signature area is disabled, you can not draw over it. The button toggles it.