1. Click the right upper corner of the theme icon and then click “+

2. Upload your preferred image or video. 

Format Requirements: 

1. For images: JPG or PNG, less than 1MB

2. For videos: MP4 or MKV, less than 20MB

Please note:

NoxPlayer will automatically select the image within the range of 1920*1080 without changing the aspect ratio, so currently please adjust your perferred wallpaper manually before customizing it inside Nox. Take this 1920*1920-sized image as an example:

3. Here is the effect: