Index: sources/gui/qml/components/HeaderBar.qml
===================================================================
diff -u -re1ecb77ba0ff9619b7363f14e1ed3c3e110c4057 -rbe918124565d9f0add371e25782804f19e0cba17
--- sources/gui/qml/components/HeaderBar.qml	(.../HeaderBar.qml)	(revision e1ecb77ba0ff9619b7363f14e1ed3c3e110c4057)
+++ sources/gui/qml/components/HeaderBar.qml	(.../HeaderBar.qml)	(revision be918124565d9f0add371e25782804f19e0cba17)
@@ -114,8 +114,11 @@
             iconSize        : Variables.headerIconDiameter
             iconImageSource : "qrc:/images/iPrescription"
             extraSpace      : _headerButtonRow.spacing
+            visible         : vTDOpMode.preTreatment        ||
+                              vTDOpMode.inTreatment         ||
+                              vTDOpMode.postTreatment
 
-            onPressed       : print("Prescription button pressed!")
+            onPressed       : _headerbarPrescription.open()
         }
 
         IconButton { id  : _wifiButton