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sign on a white piece of paper give it a couple of tries for the best one and take a photo or scan if possible once in photoshop crop the signature and go to channels select the red channel because it has the highest contrast between the signature and the paper go to image adjustments and curves hold the alt key or the option key and take the slider on the right to the left to the point where the details around the signature go away similarly hold the alt k or the option key and take the slider on the left to the right just to the point where you begin to see these black artifacts hit ok hold the controller command and click on the thumbnail of the red channel this selects the white areas press ctrl or command shift i to invert the selection get back to layers you dont need this anymore so turn it off and create a solid color adjustment layer with whatever color you wish and here you have your digital signature on a transparent background you can save it as a png if you wish and the g
