Dual-screen - About having the choice of resolution

- Sorry for my english, I'm not fluent -
I just get a new MacBook Pro, and so do I receive it with Mavericks installed. I bought it for professionnal use in theater shows: displaying video on screen, connect it to videoprojectors (VP), ...
And here is the fact: I'm just like... *shocked* about not being allowed to choose the resolution on an external display in Mavericks.
This afternoon, installing a show on tour, I plugged my brand new MacBook Pro to the magnificient videoprojector provided by our host (first time I plug an external "display" on this machine) and here it is: the VP receive the picture in 4:3 ratio because the OS seems to think it's better for him. So have I the choice between 800x600 ('TF!?) and 1024x768 ('TF-again !?) for a brand new VP (as new as the MBP), the kind of VP you can say "full option", the kind you can compare to a Rolls Royce.
And in the list of display resolutions, nothing else to choose.
What is the criterion for the OS thinks 4:3 @800x600 is optimal for this VP?
So, in a professionnal environnement like this one (artistic - we care the "finesty" of the result - and technic - we aren't n00bz with machines), how should I proceed to get a real picture on the screen? Something like - hey, HD!
Where are the real basic options for *just* being ok with my external displaying device?
The fact that in the past people were allowed to see the possibilities of this resolution's choice in System Preferences; seriously, Apple, did you received complains about lost people facing with this options and getting suicide because *to much complexity* ? Does anybody had been disturbed about this options presence?
Come on, seriously, 'TF are you doing with all the changes like this one everywere in your originally great OS?

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*http://kb.mozillazine.org/Zoom_text_of_web_pages
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The_Tiger92 wrote:
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