First you will receive an email with the request to sign. The e-mail contains a link that gives you access to the document. If you click on the link you will enter the following screen:
To sign, click on the "Tap to Sign" or "Click to sign" button. If the sender of the signing request wants a graphic signature to be placed under the document, you are now given the option to sign your graphic signature with your finger or a special pen.
If you are not satisfied at once, you can redraw the signature by clicking on "free".
After placing your doodle you will get an extra confirmation screen.
After you confirm, the document is officially signed.