| Tip 35 | Get Complex Multiple-Display Setups |
If you have three or more displays or projectors attached to your Mac, you might want to selectively mirror the content of one display on another yet use the others as independent monitors with their own desktops. Although there’s a Mirrors Displays checkbox in the Displays pane of System Preferences when the Arrangement tab is selected, it’s not designed for a setup this complicated.
Setting Up Mirroring
The solution is surprisingly simple. Open System Preferences (Apple menu→System Preferences), switch to the Displays pane, and select the Arrangement tab. Then turn off display mirroring completely, as described earlier, so that each screen has its own desktop. Then hold down Option and drag and drop ...
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