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    $\begingroup$ (+1) {"KeyDown","\.08"} works also on Windows. But {"KeyDown":>Print[FullForm@CurrentValue["EventKey"]]} doesn't catch Backspace. $\endgroup$ Commented Mar 10, 2017 at 19:08
  • $\begingroup$ @AlexeyPopkov are you saying that {"KeyDown","\.08"} , but {"KeyDown":>Print[FullForm@CurrentValue["EventKey"]]} doesn't print "\.008"??!! Does it catch ESC? $\endgroup$ Commented Mar 10, 2017 at 19:39
  • $\begingroup$ Oh fascinating! I guess I should have found this from: here. It prints something invisible and I assumed it was a blank cell. I will have to back and figure out what all of these do. $\endgroup$ Commented Mar 11, 2017 at 1:09
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    $\begingroup$ @BlacKow Yes, {"KeyDown":>Print[FullForm@CurrentValue["EventKey"]]} prints None when I press Backspace or ESC. I'm on Windows 7 x64, checked with versions 8.0.4, 10.4.1 and 11.0.1. $\endgroup$ Commented Mar 11, 2017 at 4:33