I got a fine and dandy mini DisplayPort to VGA adapter for my MacBook Pro - I hooked up an external Dell monitor and it works well in landscape.
Any tips on how to make the display on external monitor in portrait mode?
migrated from stackoverflow.com Feb 8 '11 at 23:56
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The option should be visible by default for an external monitor, but I assume since you're asking this question that it is not.
There's a little-known trick that works for the internal LCD on MacBooks; I suggest trying that: