The other day, I was in my car, waiting for a traffic light behind a pedestrian crossing. A friend of mine crossed the street right in front of me. For some reason, I didn't try to get his attention. I didn't do anything to make him notice me.
Is there any verb to replace "try to get his attention" or "make him notice me" in the two previous sentences? "Notify" and "inform" are tagged as formal in my dictionary. What other verbs will a native speaker use in this case?