Okay, if I select the camera and then (with Shift+RM) select an object, then by pressing Ctrl+T and selecting ‘Track to Constraint’ from the resulting ‘Make Track’ popup menu, I can move the object around and the camera continues to ‘look’ at the object all the time. That works as documented. So, when I render the animation, I get what I expect.
However, suppose instead I select the camera and then go to the Object panels (with F7), and then on the ‘Constraints’ panel I click on ‘Add Constraint’ and fill in the constraint so it looks exactly like the Ctrl+T method/panel result above, I see the dashed line from the camera to the object okay. But, when I move the object around, the camera does not keep looking at it. The dashed line connecting camera to object does continue to show the connection, but when I render the animation, sure enough, the camera does not track the object.
So, what’s the diff? Is there some other value or option I have to set before the second method works the same as the first? I may not ever need the second method, but if someday I might, I’d like to know how it can be used successfully. One of the Intro docs I’m reading uses the second method, and from that document, I get the distinct impression it should work in the same manner as the first method.