[2] or [8] is used to select the option shown in a shaded area [XXXXX], and pressing [6]
executes the option. [6] or [4] is used to switch to the option in a non-shaded area
[XXXXX], and, after that, [2] or [8] is used to select an option. A selected test is
executed by pressing [6], and ended by pressing [4].
22