1) Open up the Chrome Developer Tools (CTRL+SHIFT+I).
- screen1.jpg (188.99 KiB) Viewed 7405 times
2) Click the gear icon in the bottom-right corner.
- screen2.jpg (50.06 KiB) Viewed 7405 times
3) Click the "Overrides" tab..
4) and turn on the Device metrics.
- screen3.jpg (114.15 KiB) Viewed 7405 times
Simple right?..