I use a 1920x1200 laptop screen with a 24 inch widescreen monitor (oriented in landscape) also running 1900x1200.
I use the option to Extend my screen with the second monitor, but I work in Captivate all on one monitor and dump all my other programs on the other.
In college I also requested (and after 6 months waiting) got same type of 24" monitor, that I now combine with my laptop (1600x900). Mostly I keep Captivate on that big monitor and other apps on the laptop, but for some big projects I will float some panels and move them to my laptop as well. Perhaps I'll try once more to have a third monitor
I tried the portrait orientation but it was ridiculously tall and then severely truncated the right side of the activity.
Changing to something larger isn't an option so I just need to live with it. Most of our activities aren't 1200px tall, but the few that must be are challenging to create/update. In general our (internal only) customers use desktops with two 1600x1200 monitors. Lately we've been delivering more content to laptop users (managers, outside sales) and need to be more considerate of their laptop limitations.
To give myself more vertical space, I tried moving the Timeline to my 2nd monitor and that was.. different. I might experiment with it a little and see if I can live with that arrangement.
I'm using dual monitors 22 inch running at 1920 x 1080. I have Captivate on one of the screens and storyboards / windows explorer views / graphical assets etc on the other screen.
This setup seems to work well for me and if I need more space on my main Captivate screen I move the properties panel over on the other monitor. I always keep the timeline on the same monitor as my main Captivate window. I tried moving it as well and that was just not productive at all ;o)
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