diff --git a/Installing-the-software.md b/Installing-the-software.md
index c7407df..23abb40 100644
--- a/Installing-the-software.md
+++ b/Installing-the-software.md
@@ -42,6 +42,7 @@ Now extract your previously downloaded code to folder named TEF6686_ESP32
 -  Open your User_Setup.h file (located in Documents/Arduino/libraries/TFT_eSPI folder) with these values:
 ```
 //#define ARS                 // uncomment for BGR type display (ARS version)
+//#define DEEPELEC_DP_66X     // uncomment for DEEPELEC Portable DP-66X build
 
 #define ILI9341_DRIVER
 #define TFT_DMA_SUPPORT