How do you delete multiple messages all at once versus one click at a time in the boxes both for inbox and emptying out your trash bin all at once?  I don't want to have to keep clicking on each box to delete a full box.  There must be a way to delete all at once like you can on Microsoft Outlook emails by clicking on one message and going down to the bottom of box to click on the last message if you want and it highlights all in between messages to be erased.

Please help.