Is Target Display Mode unidirectional?

I want to connect my iMac & Macbook Pro via a Thunderbolt cable and use multiple displays. However, I also want to use the keyboard and mouse from my iMac to interface with this dual display setup. It seems at this point that Target Display Mode will only work in one direction. Is there a way to make the iMac the controlling computer instead of the Macbook pro??

Target Display mode is unidirectional. You need to use a program such as ScreenRecycler to go the other way.
(91584)

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