Use the following methods to select items in a listbox:
Use the Operating tool. With a multiple-selection listbox, press the <Shift> key and click additional items to select more than one item.
Use the arrow keys. Press the space bar to add the currently highlighted item to the list of selected items. Remove the currently selected item from the list of selected items by pressing the space bar.
Type part of the name of the option you want. Use the left and right arrow keys to go to the previous or next items that match the letters you type.