diff --git a/plugins/UM3NetworkPrinting/NetworkPrinterOutputDevicePlugin.py b/plugins/UM3NetworkPrinting/NetworkPrinterOutputDevicePlugin.py
index 7a86002210..2725fa8d17 100644
--- a/plugins/UM3NetworkPrinting/NetworkPrinterOutputDevicePlugin.py
+++ b/plugins/UM3NetworkPrinting/NetworkPrinterOutputDevicePlugin.py
@@ -124,6 +124,7 @@ class NetworkPrinterOutputDevicePlugin(OutputDevicePlugin):
     ##  Stop looking for devices on network.
     def stop(self):
         if self._zero_conf is not None:
+            Logger.log("d", "zeroconf close...")
             self._zero_conf.close()
 
     def getPrinters(self):
@@ -136,10 +137,12 @@ class NetworkPrinterOutputDevicePlugin(OutputDevicePlugin):
 
         for key in self._printers:
             if key == active_machine.getMetaDataEntry("um_network_key"):
+                Logger.log("d", "Connecting [%s]..." % key)
                 self._printers[key].connect()
                 self._printers[key].connectionStateChanged.connect(self._onPrinterConnectionStateChanged)
             else:
                 if self._printers[key].isConnected():
+                    Logger.log("d", "Closing connection [%s]..." % key)
                     self._printers[key].close()
 
     ##  Because the model needs to be created in the same thread as the QMLEngine, we use a signal.
@@ -149,6 +152,7 @@ class NetworkPrinterOutputDevicePlugin(OutputDevicePlugin):
         global_container_stack = Application.getInstance().getGlobalContainerStack()
         if global_container_stack and printer.getKey() == global_container_stack.getMetaDataEntry("um_network_key"):
             if printer.getKey() not in self._old_printers:  # Was the printer already connected, but a re-scan forced?
+                Logger.log("d", "addPrinter, connecting [%s]..." % printer.getKey())
                 self._printers[printer.getKey()].connect()
                 printer.connectionStateChanged.connect(self._onPrinterConnectionStateChanged)
         self.printerListChanged.emit()
@@ -158,6 +162,7 @@ class NetworkPrinterOutputDevicePlugin(OutputDevicePlugin):
         if printer:
             if printer.isConnected():
                 printer.connectionStateChanged.disconnect(self._onPrinterConnectionStateChanged)
+                Logger.log("d", "removePrinter, disconnecting [%s]..." % name)
                 printer.disconnect()
         self.printerListChanged.emit()
 
diff --git a/resources/definitions/fdmprinter.def.json b/resources/definitions/fdmprinter.def.json
index 9bc7a58897..2fb0794766 100644
--- a/resources/definitions/fdmprinter.def.json
+++ b/resources/definitions/fdmprinter.def.json
@@ -228,7 +228,7 @@
                 "machine_heat_zone_length":
                 {
                     "label": "Heat zone length",
-                    "description": "The distance from the tip of the nozzle in which heat from the nozzle is transferred to the filament.",
+                    "description": "The distance from the tip of the nozzle in which heat from the nozzle is transferred to the filament. When an extruder is not needed any more, its filament is moved out of the heat zone.",
                     "default_value": 16,
                     "type": "float",
                     "settable_per_mesh": false,
@@ -238,7 +238,7 @@
                 "machine_cool_zone_length":
                 {
                     "label": "Cool Zone Length",
-                    "description": "The length of the piece that dissipates heat from the hot end to shield heat-sensitive equipment.",
+                    "description": "The length of the piece that dissipates heat from the hot end to shield heat-sensitive equipment. When an extruder is not needed any more, its filament is moved out of the cool zone.",
                     "default_value": 0,
                     "type": "float",
                     "settable_per_mesh": false,