How to View plug in window?

Sorry if this is a basic question. I create a new track and assign type as "plug in". Now I hear the plug in's sounds. However I can't find a way to view the plug-in's GUI to tweak the sound. Thanks for the help!

The button with a little 'e' next to the plugin name.

phx_chronic wrote:The button with a little 'e' next to the plugin name.

Ah, thanks!!!!! Is the place in the MPC that you can go to assign parameters? I would love to be able to assign cutoff to one of the Q links.