I have a MBP Retina and in the office I use it with a Monitor Sony LMD-2450W connected through AMD Port to VGA. After installing 10.9.2 the resolution in the monitor has been downsized to 4:3 (and 1280x960) instead of its 16:9 display. Anyone know how to

I have a MBP Retina LCD (resolution 2880x1800) and in the office I use it with a Monitor Sony LMD-2450W connected by VGA. After installing 10.9.2 the resolution in the monitor has been downsized to 4:3 (and 1280x960) instead of its 16:9 display. Anyone know how can I change the resolution manually?
Display shows only 3 different resolution if I choose "scaled" but none use the full area of the monitor.
Thank you
Marco

This has been an ongoing problem with external monitors that predates 10.9.2. I wrote various tips on different methods here, though the best is probably the hot corner one:
http://applehelpwriter.com/2014/01/25/how-to-correct-the-external-monitor-resolu tion/
(note: this links to my own personal website and is not endorsed by apple in anyway)

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