Methods and apparatus, including computer program products, implementing and using techniques for signing an electronic document, including establishing an electronic signature appearance for an electronic signature, determining a bounding region on the electronic document for the display of the electronic signature appearance, at the time of signing an electronic document, previewing the electronic signature appearance in the bounding region and signing the electronic document with an electronic signature, the electronic signature associated with the electronic signature appearance. The electronic signature appearance can be configured at the time of signing the electronic document.