The following functions can be applied to multiple E-Mails at once:
forwarding E-Mails
moving or copying E-Mails to another folder
marking E-Mails as read or unread
categorizing E-Mails with a label
deleting E-Mails
How to apply a function to multiple E-Mails at once:
Click the Select icon below the sidebar. Each E-Mail will have a checkbox in the sidebar.
Check the boxes for at least two E-Mails.
Click on a function in the display area.