Send an email to yourself with a PC, and the content of the email is your signature. Opening email applications, including those in HTML format, and collecting newly sent emails will be used to open partial copies of signatures-> E-mail, address book, calendar, click signature: paste the copied content into the signature input box, return to the email application, and create a new email. You can see that the newly copied signature with link has taken effect: after work, why did the agreed three steps become six? Actually, it is. Everything in the world can be divided into three steps: preparation and implementation. Finally, the email application of iOS does not support all HTML formats, and it is useless to write too complicated. At present, only basic formats such as bold, italic and hyperlink are supported. You can edit the signature in the corresponding HTML format with similar Outlook or other mail clients on the PC side and send it to yourself for verification.