Update faq.md

Author: birdybro

docs/basics/faq.md

@@ -192,6 +192,10 @@ Generally, no. While it’s always possible that someone will take time to port
 
 A number of complex cores (like ao486) benefit from having the chip at cooler temperatures, since heat can affect the tight timings they require. A heatsink is recommended to avoid any possible glitches, but you won't damage your DE10-Nano if you choose not to use one. A fan is even better on top of that.
 
+## How do I change the wallpaper/background on the Menu core when I turn on my MiSTer?
+
+By default the background of the Menu core when you turn on the MiSTer displays a simulation of old TV static. You can change the background type to color bars, plain black background, and a wallpaper. The wallpaper option will check for `menu.jpg` or `menu.png` in the root of your MicroSD storage (or `/media/fat/` when the MiSTer is running). If you don't have either of these files there then it will look in the `./wallpapers` folder and randomly pick any `.png` or `.jpg` file inside each time the Menu core is loaded. Please note, EXIF metadata for rotation values will influence the orientation of the image. You can modify this value with online EXIF data editors available if you run into orientation issues.
+
 ## Can you take screenshots on the MiSTer?
 
 You can take screenshots on the MiSTer very easily. All you have to do is press ++win+prtsc++ on your keyboard and you will get an upscaled screenshot. For raw output from the core (which may be distorted or in a weird aspect ratio) prese ++shift+win+prtsc++. The screenshots are stored in `./screenshots` in a folder named after the core you took the screenshot in.