Adjustable Zoom and Density Control on Main Screen for Better Day Overview

It would be great if I could change directly in the main screen (without going to settings) the density / zoom factor freely with something like a zoom bar so I can see my day

a) with 24h on one screen without scrolling

b) with 12h on one screen

c) with 6h

d) with 3h

e) with 2h

would be great to allow gestures to zoom in/out like zooming into a picture.

Background: I like to see my day first thing at the morning at a glance. When moving tasks and appointments I need some zoom level in between like 6h and when I work on something I love to keep my calendar with a 3h window to really concentrate on my current tasks (even if they are 5-15mins each. In this scenario I'd like to have a possiblity to change from the grouped view of for example "3 tasks" into "task 1 xxxx", "task 2 xxxx", "task 3 xxxx" all next to each other (as this will be very readibly on max. zoom factor.