Describe Arduino IDE bootloader burning

bootloader/README.md

@@ -72,8 +72,14 @@ run `openocd -f unprotect_bootloader.cfg`. Then you can overwrite it without any
 
 ## Arduino IDE
 
-See "Bootloader Firmware Installation"
-[here](https://github.com/mattairtech/ArduinoCore-samd/blob/master/bootloaders/zero/README.md).
+If you're going to eventually program your board from the Arduino IDE, this is probably the easiest
+option. First, install the MattairTech board cores as described in the "Programming with the Arduino
+IDE" section below. Then in the Tools menu, select your board, set your programmer to ATMEL SAM-ICE,
+and click Burn Bootloader.
+
+Original docs on this are
+[here](https://github.com/mattairtech/ArduinoCore-samd/blob/master/bootloaders/zero/README.md)
+(search "Bootloader Firmware Installation").
 
 ## Atmel Studio