add back buttong pin to config sample

diff --git a/ConfigSamples/Smoothieboard/config b/ConfigSamples/Smoothieboard/config
index 66eefc7..58c5e7c 100644 (file)
--- a/ConfigSamples/Smoothieboard/config
+++ b/ConfigSamples/Smoothieboard/config
@@ -159,7 +159,8 @@ panel.encoder_b_pin                          1.23!^            # encoder pin
 #panel.encoder_b_pin                         1.23!^            # encoder pin         ; GLCD EXP2 Pin 5
 #panel.click_button_pin                      1.30!^            # click button        ; GLCD EXP1 Pin 2
 #panel.buzz_pin                              1.31              # pin for buzzer      ; GLCD EXP1 Pin 1
-#panel.button_pause_pin                      2.11^             # kill/pause          ; GLCD EXP2 Pin 8
+#panel.button_pause_pin                      2.11^             # kill/pause          ; GLCD EXP2 Pin 8 either
+#panel.back_button_pin                       2.11!^            # back button         ; GLCD EXP2 Pin 8 or
 
 # pins used with other panels
 #panel.up_button_pin                         0.1!              # up button if used