The pairing box consists of the Find Pairing popup list and the Pairing on Lines popup list.
The Find Pairing popup list allows you to view any pairing by either selecting it from the list or entering the pairing number and pressing return or enter. Selecting a pairing populates the Pairing on Lines popup list with all lines that contain that pairing. The list will initially appear empty. Click on the list to reveal it's contents.
Using the Pairing on Lines popup list you may view any line that contains the pairing selected in the Find Pairing popup list. Selecting a line in the Pairing on Lines popup list will select the line in the listbox, move it to the top and display it in the calendar view. The Pairing on Lines popup list will be empty until a pairing is selected in the Find Pairing popup list. Additionally, you must click on the list to reveal it's contents.