It's simple to use the locker. After you have decided which "box" you would like to use, simply go to your guide and choose the location (which tab and which column) for where you would like the box to be located. "Add New Box" like you would normally do, but instead of selecting "Create a new box" from within the pop-up window you will "Link to another box in the system". By selecting this option a list of all the guides in NYU's system will appear, you can then select "LOCKER BOX" from this list and locate the specific box.