Introduction - If you have any usage issues, please Google them yourself
1), click the up arrow on the keyboard, the window displays " You had hit the up key" (2), click <Shift> Key, the window displays " You had hit the SHIFT key" (3), click <Ctrl> Key, the window displays " You had hit the CTRL key" (4), click <Ctrl+A> Key, the window displays " You had hit the CTRL A key" (5), click <Shift+B> Key, the window displays " You had hit the SHIFT B key"