diff --git a/docs/helios64/button.md b/docs/helios64/button.md
index 0d8ca7d..1abb09e 100644
--- a/docs/helios64/button.md
+++ b/docs/helios64/button.md
@@ -21,6 +21,17 @@ Helios64 board provides a RESET push button (SW3) to hard reset the system.
 
 Helios64 board provides a RECOVERY push button (SW2) to allow user to easily flash over USB the on-board eMMC storage. This can be useful if you want to do a fresh install or if you want to repair a system that doesn't boot anymore.
 
-User can enter recovery mode by pressing this button during boot up (bootloader stage). U-Boot will read the button state and switch the USB type-C port into USB Mass Storage device to expose eMMC flash as storage device. User can then use flash tools to write new OS image into eMMC flash.
+User can enter recovery mode by pressing this button during boot up (bootloader stage). U-Boot will read the button state and switch the USB type-C port into USB Mass Storage device to expose eMMC flash as storage device (UMS mode).
+
+!!! note
+    Recovery mode is only supported since Armbian version 20.08.13. You need to have U-Boot installed either on microSD card or on eMMC. Refer to fresh install [section](/helios64/install/preliminary/#install-options) if you haven't setup your system yet.
+
+**Quick Instructions :**
+
+1. Press and hold Recovery Button during power-up until System Status LED blinks 1 time. System should enter UMS mode and your computer should have detected a new storage device called _Linux UMS disk 0_.
+
+2. User can then use flash tools to write new OS image into eMMC flash. Refer to this [section](/helios64/install/emmc/#step-5-writing-an-os-image-to-internal-emmc).
+
+User can also enter into *maskrom* mode in order to use some of the Rockchip programming tools (e.g [rkdeveloptool](https://github.com/rockchip-linux/rkdeveloptool)). For this, you will need first to enable [Jumper 13](/helios64/jumper/#usb-consolerecovery-mode-p13). To enter *markrom* mode, press and hold Recovery Button during power-up until System Status LED blinks 2 times.
 
 Under Linux, this button behaves as user button and when pressed will emit **BTN_0** keycode (refer to [Linux Input Codes](https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/plain/include/uapi/linux/input-event-codes.h)). Therefore this button can also be used to trigger other actions than recovery.