track matte option seems to have disappeared and cant find it

Sorry if this is a stupid or obvious question.  Usually, you hit f4 to bring up the track matte column, right? But ever since switching to MacBook 15" where the f keys are substituted by the touch bar, that short cut won't work.  (even by holding function key).  I also can't access it by right clicking "switch" and selecting "column," as shown on a track matte tutorial.  I'm on the latest AE, by the way.  Can anyone tell me how to bring up the trkmatte options?

Thanks!