It's to facilitate a type of keyboard technique that would otherwise accidentally press the Windows key. There may be others, but the one keyboard layout/system I know of that uses it is TheCore: http://www.teamliquid.net/forum/viewmessage.php?topic_id=341... (mentioned under "Lesson 1: Positioning").
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Can someone tell me why some of the players keycaps are missing in the APM video?
It's to facilitate a type of keyboard technique that would otherwise accidentally press the Windows key. There may be others, but the one keyboard layout/system I know of that uses it is TheCore: http://www.teamliquid.net/forum/viewmessage.php?topic_id=341... (mentioned under "Lesson 1: Positioning").