Dark mode is the way to view the screen of your device (mobile phones, computers, etc.) with white text and a dark background (almost black). And the Light Mode mode is the opposite; you view the screen with dark text and a light background.
1. Click on the right corner where your USERNAME appears and enable the DARK MODE.%2012-17-19-png.png)
2. The DARK MODE is automatically enabled on the platform. If you need to disable it, you just have to click on DARK MODE to return to LIGHT MODE
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