To select several individual records, hold down the Ctrl key and click each record you want to select. To select a range of records, click on the first item, hold down the Shift key and then click the last item. Shift-click always selects down or up from the last clicked item, no matter whether it was clicked with Ctrl, Shift or nothing. It also undoes all other selections, as does a simple click. By contrast, Ctrl-click adds to existing selections, it does not void them.