I have many calendars in Google Calendar, and I would like to be able to quickly switch from viewing one set of calendars to another set. This is extremely useful when planning, where I have several calendars for potential events of different categories, each in a separate calendar. I know Fantastical (on Mac OS) has this function, but $50 is way too much for just this one capability.
I could manually click the calendar icons on Google Calendar web interface to switch between, but that's quite a number of clicks. Is there a way to do this?