So the other day I was watching a tutorial about rigging.

At a point, it talks about adding a driver for a part of an Armature. So I followed it.

But the tutorial was using a 2.77 version of Blender but mine is 2.79. So after I added the driver, there is no Purple eye in the 2.79 Version. And a little menu also pops up after I hit "Add Driver" in version 2.79.

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What kind of sorcery is behind that? (Just kidding). Is there a way for me to achieve what the tutorial did in 2.77 version with my 2.79 version? And finally I can see the purple eye?