Update README.md

README.md

 # Arduino-Pico [![Join the chat at https://gitter.im/arduino-pico/community](https://badges.gitter.im/arduino-pico/community.svg)](https://gitter.im/arduino-pico/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
-
 Raspberry Pi Pico Arduino core, for all RP2040 boards
 
 This is a port of the RP2040 (Raspberry Pi Pico processor) to the Arduino ecosystem.
@@ -9,6 +8,9 @@ It uses a custom toolset with GCC 10.2 and Newlib 4.0.0, not depending on system
 
 There is automated discovery of boards in bootloader mode, so they show up in the IDE, and the upload command works using the Microsoft UF2 tool (included).
 
+# Detailed Documentation
+Refer to the examples and https://arduino-pico.readthedocs.io/en/latest/ for more detailed usage information.
+
 # Installing via Arduino Boards Manager
 **Windows Users**: Please do not use the Windows Store version of the actual Arduino application
 because it has issues detecting attached Pico boards.  Use the "Windows ZIP" or plain "Windows"