How to Adjust Microphone Volume on Chromebook/Tablet Author: Ricardo Bonnet Last updated: Nov 19, 2020 3353 views 1. Click on the System Tray at the bottom right side of the screen. (Where the time/battery icon is) Below is a screenshot of what should come up. 2. Click on the button next to the volume slider. 3. Adjust the slider to roughly 50-75%