A method for customizing header pages, footer pages, and/or separator pages is disclosed. According to one aspect, a user interface is displayed. The user interface comprises user interface elements through which a user can specify user-customized content that is to appear on an additional page that is to be printed with the pages of an electronic document. A user-generated representation of the content is received through the user interface. A printer driver generates modified print data based on additional print data, which represents the additional page, and original print data, which represents the electronic document. The modified print data causes the printing device to print the user-customized content on a header, footer, or separator page. As a result, when the printing device receives the modified print data, the printing device prints the header, footer, or separator page, with the user-customized content, in addition to the pages of the electronic document.