No Arrangement Tab for connecting external monitor

I have an iMac and a Macbook Air (both 2013) and I have a Thunderbolt cable to connect the two. I'd like to use the Macbook as an external monitor. When I connect the two, I don't see the "Arrangement tab" in the Displays tab under system preferences. Am I missing a step? Thank you!

iMac 21.5″, macOS 10.15

Posted on Sep 17, 2020 01:12 PM

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No Arrangement Tab for connecting external monitor

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