Here is how you will use multiple page selections. When selecting multiple items on different pages click the empty boxes next to the items you would like to select. The actions link will update to reflect items have been selected.
If you need to select items on subsequent pages then click on the page number you want to navigate to and continue selecting items.
Continue clicking empty boxes for other items you want to add. Then click on the action button to either add or remove the selected items. You can reset your selections by clicking the reset selection link.