Have a look at this video tutorial.

In particular, look at the 2:20 mark, where the individual first bar and then how subsequent bars are identified.

There is another video on using the ACW here:

BIAB & RB2021(Audiophile), SonarPlatinum, Izotope Prod.Bundle, Roland RD-1000, Synthogy Ivory, Kontakt, Focusrite 18i20, KetronSD2, NS40M StudioMonitors, Pioneer Active Monitors, AKG K271 Studio H'phones