Can't answer you;re question directly has I haven't installed Lion yet but over in the Lion discussion list this post might answer your question re: Dual Monitors Anyone grasped dual monitors with Lion yet? . Seems that dual monitors may not be supported in full screen mode.
This topic is of huge interest to me, since I have a three monitor setup, and am close to a Lion upgrade.
BTW, in Snow Leopard, the navigation is a three-fingered swipe.
The support for what Aperture calls the "Secondary Viewer" under Snow Leopard is pretty much useless to me, since Aperture regards both external monitors as the "Secondary Viewer" and pointlessly overlays whatever I have on the third monitor with whatever I have on the second screen, so I get to see it twice, and can no longer easily multitask. I was kind of hoping Lion might fix this.
My suggestion would be to just use the second monitor for HUDs only.
But if you have news or advice on this topic, please do post back here!
Lion does not currently support mulitple monitors when in full screen of an app.
Basic write up at MacWorld here (section after Gestures):
Some good overall Lion information at same site as well:
If you also run Adobe products, make sure to take note of the fact that Lion does not install Java runtime which Adobe products need to run properly.
Thanks for this. I just went to the OS X feedback site and gave them this message.
"I have a maxed-out 2011 iMac 27" with a triple monitor setup. I might have Aperture on the main screen in full-screen mode, Mail on the left one, Safari on the right.
This allows me to multi-task very efficiently.
I read in MacWord today that Lion destroys this ...
"Lion’s full-screen mode doesn’t work well if you have multiple monitors. When you use an app in full-screen mode, monitors other than your primary display are dead zones: The app fills up your main screen, and other displays show only gray linen wallpaper. "
Why would you replace my view of Mail and Safari with "gray linen wallpaper"? This is not very helpful, and doesn't demonstrate any understanding of how we in the real world use monitors. I did not buy two large monitors to display linen patterns!"
If you feel this is important, I suggest you go to http://www.apple.com/feedback/macosx.html and have your say
Just to clarify what I'm looking for with Aperture/Lion and multiple screens.
Here is a shot of my three monitors in Snow Leopard, from the left you see Mail +Aperture HUD, Aperture in full screen mode, Keyword HUD + Safari
With Lion, will left and right monitors have Mail and Safari hidden by a linen pattern when Aperture is in this full screen mode?