Every email in the inbox list has a checkbox to its left. Use these checkboxes to select one or more emails and apply an action to all of them at once, instead of opening and processing each one individually. This is especially useful when you are clearing out a batch of similar requests, such as marking several resolved threads as Done or starring a group of emails that all need follow-up.
Follow these steps to select multiple emails and take a quick action:
Select the checkbox next to each email you want to include, or click the Select all checkbox to select every email currently in view.
Once one or more emails are selected, a toolbar displays showing the number selected along with available actions: Clear, Select all, Mark as read, Mark as unread, Star, Unstar, Mark as done, Mark as not done, Archive, and Delete.
Click the action you want to apply. It is applied to every selected email.
Note: To remove your selections without taking an action, click Clear.