Setup Signature as a Stamp
Sign your signature on a blank piece of copy paper. Make sure the signature is heavy and dark. Using a fine point Sharpie works well.
Scan your signature to your email. Use the highest DPI your scanner can use. This will give you a crisp signature.
Open the scanned PDF in Acrobat
Export the PDF as a .PNG file.
Open the new .PNG file in MacOS preview. Select Markup.
Use the Rectangular selection tool to box around your signature.
Then Select Crop
Upload your new signature file to https://w...