On PDF files that use basic fillable text boxes, it would be great to have a feature where if you just right click, you could add a digital signature, or to be able to add a digital signature to any fillable text boxes without so many steps. You can edit a PDF to add a signature line, but sometimes others created fillable forms besides you. It also may be helpful to control the option on being able to sign things and send to yourself, because at times one might want to sign something and then send on to others.