Like the post above said theres a auto button in every plug in,at the top of it.
Press it,when it opens theres a list of options on the left. Select what you need to automate,you will see it on the right,then hit done.
Next go to the left side of your edit screen and you will see the vol,pan,ect...click and scrowl down till you see what you set to be automated.
Then there should be a line going across the track you selected the auto on,use the grabber tool and select the start and end points of the sweep.
By moving the points up and down youll see how it works and you should be able to get the hang of it from there.