For now, Print Issues will only print issues onto A4 sized paper.
Print Issues allow fine control over which issues are being printed, but also provides shortcut buttons to select the current sprint, upcoming sprints, or the backlog. To select/unselect an issue for printing, use the checkbox alongside each issue.
Print Issues for Jira includes these fields on printed issues:
Print Issues puts up to 8 Jira issues onto each A4 page.