Scroll in Background App Windows in Windows 10

Windows 10 comes with a small productivity feature that allows you to scroll in non-active application windows (documents, webpage, photos...) by placing your mouse cursor over them. 

Scroll Inactive Windows When I Hover Them

Let's say you have two application windows overlapping each other on your desktop, with focus on (1) Microsoft Word (active window) and (2) Firefox running in background: 
You can scroll in the webpage without bringing Firefox to the front (without losing focus onMicrosoft Word). Simply hover your mouse cursor over Firefox and turn the scroll wheel up or down. 

You can enable this feature in a couple of easy steps. Click on Start > Settings and navigate toDevices Bluetooth, printers, mouse > Mouse & touchpad. Toggle the Scroll inactive windows when I hover them switch ON position: