Windows 10 has brought several modifications in the Start Menu. The Start Menu is combined with the All Apps screen in a single area. You can organize the apps and Live Tiles. One interesting feature is that you can reduce the height of the Start Menu and increase it. If you take the cursor at the top right corner of the Start Menu, you will get an arrow like this
Steps to Change Height of Start Menu in Windows 10
1. This is the original height of the Start Menu.
2. If you want to reduce the size, drag the arrow downward.
3. If you want to increase the size of the Start Menu, drag the arrow downward.