Pointing and calling is a process to ensure the train driver is paying attention. By pointing to a object and calling on it, the driver can effectively memory the speed limit, pay attention to upcoming signal,etc. It is commonly used in Japan, which is not limited to transportation field but also others such as construction.

A train driver is pointing to the timetable, so the train must be approaching the station and he is checking if he needs to stop at the station, time to arrive/pass the station. Seems like a JR train to me.

Guide to perform pointing and calling. A simple gesture can reduce risk of mistake in great extent! Moreover, it looks cool and you are doing something professional !