Optionally, each signature can be copied for pasting into either the default Mail app or a third-party mail application by tapping and holding the signature item.
Each signature can contain multiple lines, optionally with HTML formatting and/or a picture.
iSignature allows you to create and use multiple signatures with the option to use HTML and/or attach a picture to them.
The signature entries are created/edited in the iSignature application, not in the global Settings application.
If you would like to select from multiple emails with pre-entered To, Subject, Cc, Bcc, and body fields, please check out iSignature's sister product, iQuickMail.