Since upgrading to the latest I notice that the Attachments Instance meta box now includes a print friendly option.
This is generated by the plugin WP Print Friendly,
Version 0.6 | By Erick Hitter, Steven K Word, and Oomph, Inc.
This adds a print friendly link to the content. You can control the position of the link, above or below the_content, via the settings. When doing this it moves the print friendly link above or below the caption in the instance.
WP Print Friendly has the options to act on various post types as does Attachments. In this case both are available on Pages and an additional CPT.