Merge pull request #128 from what-does-that-do/main

Clarified how to boot from RW_LEGACY

src/docs/firmware/flashing-firmware.md

@@ -37,3 +37,7 @@ It can take up to a minute for display to come up on first POST. **Do not interr
 **RW_Legacy**
 
 On the developer mode boot screen, press `CTRL` + `L`. If a selection appears, pick "Tianocore".
+
+If you are met with a white `Alternative Firmware Menu` screen (after pressing `CTRL` + `L`), enter `2` to boot from USB or `0` to boot from internal storage (where you installed your Linux OS).
+
+Further boot options can be accessed after you have entered a number, by pressing `ESC` as signified by the booting screen. If you wish to access these options before you've installed an OS, press `0` then `ESC`.

src/docs/installing/installing-linux.md

@@ -35,6 +35,12 @@ Debian versions older than Debian 12 (Bookworm) are **not supported**. Debian 12
 3. Turn on the Chromebook, press `ESC` at the POST screen (when the coreboot logo appears), and select your USB to boot from. 
 4. Install as you would on any other computer.
 
+::: tip
+If you are using `RW_LEGACY` firmware, if after pressing `CTRL` + `L` you reach the `Additional Firmware Menu` white screen, you will need to press `2` to boot from a USB.
+
+See [this page](../firmware/flashing-firmware.md) for more information about RW_LEGACY booting.
+:::
+
 ---
 
 ## Fixing Audio