Three Monitors, Two Spaces?

ImagineMBE wrote:

I am using the Macbook in clamshell mode with a docking station attached to two monitors. I want to use my Citrix application with the two monitors, and then extend to my iPad Pro for a third monitor, but NOT use the third monitor for Citrix.

Citrix will only span two monitors if the "Displays have separate Spaces" option is turned off. And if the third monitor is connected, it'll use all three.

Is there a way that I can set up one space for both monitors 1 and 2 and a second space for monitor 3, so I can assign Citrix to the first space only?

see if there is anything here—

Mirror 2 of 3 displays

Click the ? at the lower-right of the "Arrangement" tab of "Displays" system preference.

"To set up a combination of displays showing mirrored and extended desktop images, set up the three displays as an extended desktop, and then Option-drag a display icon onto another display icon to mirror the two displays."

Use external monitors with your Mac: Connect a display to your Mac - Apple Support

clamshell has been removed

You can always Call Customer Support (800) MY–APPLE (800–692–7753)

or on line Apple Support