In order to add a piece of content to the queue from the content page, check the box on the left side of its row in the list. You can also check the box at the top left of the list to add all items currently displayed to the queue.

There is a maximum of 200 items allowed in the queue at a time, so any checkbox that will add more than 200 items will be disabled. You can uncheck any of the checkboxes to remove an item from the queue if you want to make room for another piece of content.

Please note, clearing your browser cache empties out your existing queue.