Click on the 3 dots in the top right corner of your screen:
Click on the + symbol to zoom in and the – symbol to zoom back out.
Zoom 100% is the default screen size. Click the "–" symbol to zoom out and achieve more vertical space. The image below is 90% on a 15 inch laptop screen and shows hours 9am - 5pm
Click the "+" symbol to zoom in and make everything bigger including text size. The image below is 120% on a 15 inch laptop and shows 9am - 2pm:
Alternatively, you can hold the “cmd⌘” key on your keyboard with either the + or - symbols at the top of your keyboard to zoom in and out.