diff --git a/cura/PrinterOutput/GenericOutputController.py b/cura/PrinterOutput/GenericOutputController.py
index a21425af92..470848c208 100644
--- a/cura/PrinterOutput/GenericOutputController.py
+++ b/cura/PrinterOutput/GenericOutputController.py
@@ -64,6 +64,9 @@ class GenericOutputController(PrinterOutputController):
     def homeBed(self, printer):
         self._output_device.sendCommand("G28 Z")
 
+    def sendRawCommand(self, printer: "PrinterOutputModel", command: str):
+        self._output_device.sendCommand(command)
+
     def setJobState(self, job: "PrintJobOutputModel", state: str):
         if state == "pause":
             self._output_device.pausePrint()
diff --git a/cura/PrinterOutput/PrinterOutputController.py b/cura/PrinterOutput/PrinterOutputController.py
index b5b0dd0be3..58c6ef05a7 100644
--- a/cura/PrinterOutput/PrinterOutputController.py
+++ b/cura/PrinterOutput/PrinterOutputController.py
@@ -16,6 +16,7 @@ class PrinterOutputController:
         self.can_abort = True
         self.can_pre_heat_bed = True
         self.can_pre_heat_hotends = True
+        self.can_send_raw_gcode = True
         self.can_control_manually = True
         self._output_device = output_device
 
@@ -46,8 +47,11 @@ class PrinterOutputController:
     def moveHead(self, printer: "PrinterOutputModel", x, y, z, speed):
         Logger.log("w", "Move head not implemented in controller")
 
-    def homeBed(self, printer):
+    def homeBed(self, printer: "PrinterOutputModel"):
         Logger.log("w", "Home bed not implemented in controller")
 
-    def homeHead(self, printer):
-        Logger.log("w", "Home head not implemented in controller")
\ No newline at end of file
+    def homeHead(self, printer: "PrinterOutputModel"):
+        Logger.log("w", "Home head not implemented in controller")
+
+    def sendRawCommand(self, printer: "PrinterOutputModel", command: str):
+        Logger.log("w", "Custom command not implemented in controller")
diff --git a/cura/PrinterOutput/PrinterOutputModel.py b/cura/PrinterOutput/PrinterOutputModel.py
index e936ace196..928a882c8c 100644
--- a/cura/PrinterOutput/PrinterOutputModel.py
+++ b/cura/PrinterOutput/PrinterOutputModel.py
@@ -110,6 +110,10 @@ class PrinterOutputModel(QObject):
     def homeBed(self):
         self._controller.homeBed(self)
 
+    @pyqtSlot(str)
+    def sendRawCommand(self, command: str):
+        self._controller.sendRawCommand(self, command)
+
     @pyqtProperty("QVariantList", constant = True)
     def extruders(self):
         return self._extruders
@@ -245,6 +249,13 @@ class PrinterOutputModel(QObject):
             return self._controller.can_pre_heat_hotends
         return False
 
+    # Does the printer support sending raw G-code at all
+    @pyqtProperty(bool, constant=True)
+    def canSendRawGcode(self):
+        if self._controller:
+            return self._controller.can_send_raw_gcode
+        return False
+
     # Does the printer support pause at all
     @pyqtProperty(bool, constant=True)
     def canPause(self):
diff --git a/plugins/UM3NetworkPrinting/ClusterUM3PrinterOutputController.py b/plugins/UM3NetworkPrinting/ClusterUM3PrinterOutputController.py
index 076c4584af..707443b9ea 100644
--- a/plugins/UM3NetworkPrinting/ClusterUM3PrinterOutputController.py
+++ b/plugins/UM3NetworkPrinting/ClusterUM3PrinterOutputController.py
@@ -15,6 +15,7 @@ class ClusterUM3PrinterOutputController(PrinterOutputController):
         self.can_pre_heat_bed = False
         self.can_pre_heat_hotends = False
         self.can_control_manually = False
+        self.can_send_raw_gcode = False
 
     def setJobState(self, job: "PrintJobOutputModel", state: str):
         data = "{\"action\": \"%s\"}" % state
diff --git a/plugins/UM3NetworkPrinting/LegacyUM3PrinterOutputController.py b/plugins/UM3NetworkPrinting/LegacyUM3PrinterOutputController.py
index 7a0e113d5b..b12a31b6cf 100644
--- a/plugins/UM3NetworkPrinting/LegacyUM3PrinterOutputController.py
+++ b/plugins/UM3NetworkPrinting/LegacyUM3PrinterOutputController.py
@@ -20,6 +20,7 @@ class LegacyUM3PrinterOutputController(PrinterOutputController):
         self._preheat_printer = None
 
         self.can_control_manually = False
+        self.can_send_raw_gcode = False
 
         # Are we still waiting for a response about preheat?
         # We need this so we can already update buttons, so it feels more snappy.
diff --git a/resources/qml/PrinterOutput/HeatedBedBox.qml b/resources/qml/PrinterOutput/HeatedBedBox.qml
index 385977141c..9de66ad0be 100644
--- a/resources/qml/PrinterOutput/HeatedBedBox.qml
+++ b/resources/qml/PrinterOutput/HeatedBedBox.qml
@@ -1,3 +1,6 @@
+// Copyright (c) 2017 Ultimaker B.V.
+// Cura is released under the terms of the LGPLv3 or higher.
+
 import QtQuick 2.2
 import QtQuick.Controls 1.1
 import QtQuick.Controls.Styles 1.1
@@ -11,6 +14,7 @@ Item
     implicitWidth: parent.width
     height: visible ? UM.Theme.getSize("sidebar_extruder_box").height : 0
     property var printerModel
+
     Rectangle
     {
         color: UM.Theme.getColor("sidebar")
@@ -209,7 +213,7 @@ Item
             }
         }
 
-        Button //The pre-heat button.
+        Button // The pre-heat button.
         {
             id: preheatButton
             height: UM.Theme.getSize("setting_control").height
diff --git a/resources/qml/PrinterOutput/ManualPrinterControl.qml b/resources/qml/PrinterOutput/ManualPrinterControl.qml
index 43fa769fb5..70961a2eb2 100644
--- a/resources/qml/PrinterOutput/ManualPrinterControl.qml
+++ b/resources/qml/PrinterOutput/ManualPrinterControl.qml
@@ -9,7 +9,6 @@ import QtQuick.Layouts 1.1
 import UM 1.2 as UM
 import Cura 1.0 as Cura
 
-
 Item
 {
     property var printerModel
@@ -125,7 +124,6 @@ Item
             return true;
         }
 
-
         MonitorSection
         {
             label: catalog.i18nc("@label", "Printer control")
@@ -429,6 +427,120 @@ Item
             }
         }
 
+        Row
+        {
+            id: customCommandInputRow
+
+            width: base.width - 2 * UM.Theme.getSize("default_margin").width
+            height: childrenRect.height + UM.Theme.getSize("default_margin").width
+            anchors.left: parent.left
+            anchors.leftMargin: UM.Theme.getSize("default_margin").width
+
+            spacing: UM.Theme.getSize("default_margin").width
+
+            Label
+            {
+                text: catalog.i18nc("@label", "Send G-code")
+                color: UM.Theme.getColor("setting_control_text")
+                font: UM.Theme.getFont("default")
+
+                width: Math.floor(parent.width * 0.4) - UM.Theme.getSize("default_margin").width
+                height: UM.Theme.getSize("setting_control").height
+                verticalAlignment: Text.AlignVCenter
+            }
+
+            Row
+            {
+                // Input field for custom G-code commands.
+                Rectangle
+                {
+                    id: customCommandControl
+
+                    // state
+                    visible: printerModel != null ? printerModel.canSendRawGcode: true
+                    enabled: {
+                        if (printerModel == null) {
+                            return false // Can't send custom commands if not connected.
+                        }
+                        if (!connectedPrinter.acceptsCommands) {
+                            return false // Not allowed to do anything
+                        }
+                        if (connectedPrinter.jobState == "printing" || connectedPrinter.jobState == "pre_print" || connectedPrinter.jobState == "resuming" || connectedPrinter.jobState == "pausing" || connectedPrinter.jobState == "paused" || connectedPrinter.jobState == "error" || connectedPrinter.jobState == "offline") {
+                            return false // Printer is in a state where it can't react to custom commands.
+                        }
+                        return true
+                    }
+
+                    // style
+                    color: !enabled ? UM.Theme.getColor("setting_control_disabled") : UM.Theme.getColor("setting_validation_ok")
+                    border.width: UM.Theme.getSize("default_lining").width
+                    border.color: !enabled ? UM.Theme.getColor("setting_control_disabled_border") : customCommandControlMouseArea.containsMouse ? UM.Theme.getColor("setting_control_border_highlight") : UM.Theme.getColor("setting_control_border")
+
+                    // size
+                    width: UM.Theme.getSize("setting_control").width
+                    height: UM.Theme.getSize("setting_control").height
+
+                    // highlight
+                    Rectangle
+                    {
+                        anchors.fill: parent
+                        anchors.margins: UM.Theme.getSize("default_lining").width
+                        color: UM.Theme.getColor("setting_control_highlight")
+                        opacity: customCommandControl.hovered ? 1.0 : 0
+                    }
+
+                    // cursor hover popup
+                    MouseArea
+                    {
+                        id: customCommandControlMouseArea
+                        hoverEnabled: true
+                        anchors.fill: parent
+                        cursorShape: Qt.IBeamCursor
+
+                        onHoveredChanged:
+                        {
+                            if (containsMouse) {
+                                base.showTooltip(
+                                    base,
+                                    { x: 0, y: customCommandControlMouseArea.mapToItem(base, 0, 0).y },
+                                    catalog.i18nc("@tooltip of G-code command input", "Send a custom G-code command to the connected printer. Press 'enter' to send the command.")
+                                )
+                            } else {
+                                base.hideTooltip()
+                            }
+                        }
+                    }
+
+                    TextInput
+                    {
+                        id: customCommandControlInput
+
+                        // style
+                        font: UM.Theme.getFont("default")
+                        color: !enabled ? UM.Theme.getColor("setting_control_disabled_text") : UM.Theme.getColor("setting_control_text")
+                        selectByMouse: true
+                        clip: true
+                        enabled: parent.enabled
+                        renderType: Text.NativeRendering
+
+                        // anchors
+                        anchors.left: parent.left
+                        anchors.leftMargin: UM.Theme.getSize("setting_unit_margin").width
+                        anchors.right: parent.right
+                        anchors.verticalCenter: parent.verticalCenter
+
+                        // send the command when pressing enter
+                        // we also clear the text field
+                        Keys.onReturnPressed:
+                        {
+                            printerModel.sendRawCommand(customCommandControlInput.text)
+                            customCommandControlInput.text = ""
+                        }
+                    }
+                }
+            }
+        }
+
         ListModel
         {
             id: distancesModel