vlc player trouble in Toggle Normal/Repeat/Loop

Question

An elderly person uses VLC player to play videos. He wants to Toggle the "Normal/Repeat/Loop". I told him for that the key "l" (small L) is given by vlc.

Now the problem he faces is: how exactly should be press the key "l" to toggle these 3 options?

How fast should press the key in succession? The OSD (on screen display) button for this is so small that he cannot use it. He gets frustrated when he cannot easily repeat or stop repeating a video. Is there a way to set 3 different keys to "Normal/Repeat/Loop", so that it becomes easier to toggle without having to rely on OSD for feedback? I tried telling him about the command-line option but that's not what I think he wants. I guess, this applies to vlc on both Windows and Linux. So updated the question.