[mmastrac]

This is interesting, though I'd be wary of calling it sane - you have to press cmd, then tab, release tab, then press option (without releasing cmd!).

What it appears to do it trigger the "reopen" command on an application, which tends to open a new window if one does not exist.

The "reopen" event is described here:

https://developer.apple.com/library/mac/documentation/Cocoa/...

and here:

https://developer.apple.com/library/mac/documentation/Cocoa/...:

[mikeash]

Thanks for explaining what it does, I couldn't figure it out at all from the article, and of course I tested it on apps that already had windows open, so nothing changed! The "open a new instance" phrasing is rather misleading: it's not opening a new instance of an application, it's opening a new window in an existing application.