Multiple Google calendars in view with filters

Hi,

I created a Fullcalendar view containing 4 Google calendars, 1 in each color. This works fine, but is not always very readable when events are overlapping.

Is there a way to put multiple Google Fullcalendars in 1 view, with a filter to select which google calendars should be shown?
I would like to have a checkbox for each calendar, which I can combine to see them in the view.

Regards