how to connect mbp to imac 27 inch

[mirariwake]

What cable do I use to connect my mbp to my imac if I want to use the mbp as a secondary screen?

Also, how to I select which computer is in use at the time?

They are both 2010 model.

thanks

 

[bb426]

This?

I don't know if you can do it the other way around.

 

[mirariwake]

damm my imac is more powerful than my mbp. I was wishing it would work the other way around.

 

[snaky69]

damm my imac is more powerful than my mbp. I was wishing it would work the other way around.

It doesn't. The port on your MBP is output only.