Currently, day view shows 24 hours of time. Generally speaking, most people only have calendar events at most half of this time. The rest of the time is empty wasted space that makes what you want to see smaller than it needs to be.

I would like to select or zoom to a particular range of hours either set like from 7 am - 10 pm or a number of hours 12 hours etc to cut down on wasted space allowing me to see detail specifically between the horizontal time bar and the edge of the event block.