Airbus 300: Differientating Between Localizer And Glidescope

Hey all, greetings from about 35 miles north of SFO.

I have a question regarding the ILS of an Airbus 320 or 300-ish airliner. I often wondered how to determine whether I was being captured on the ILS with the Localizer and Glidescope. Which display do I need to watch for both the Localizer capture and the Glidescope capture? Would it be on the PFD or ND? And how does the Localizer being captured appear? How does the Glidescope being captured appear?

- Kareem