diff --git a/kcm/config_handler.h b/kcm/config_handler.h
--- a/kcm/config_handler.h
+++ b/kcm/config_handler.h
@@ -44,6 +44,10 @@
         return m_config;
     }
 
+    void revert() {
+        m_config = m_previousConfig->clone();
+    }
+
     int retention() const;
     void setRetention(int retention);
 
@@ -69,6 +73,7 @@
 
     KScreen::ConfigPtr m_config = nullptr;
     KScreen::ConfigPtr m_initialConfig;
+    KScreen::ConfigPtr m_previousConfig = nullptr;
     OutputModel *m_outputs = nullptr;
 
     std::unique_ptr<ControlConfig> m_control;
diff --git a/kcm/config_handler.cpp b/kcm/config_handler.cpp
--- a/kcm/config_handler.cpp
+++ b/kcm/config_handler.cpp
@@ -80,6 +80,7 @@
 
 void ConfigHandler::updateInitialConfig()
 {
+    m_previousConfig = m_initialConfig->clone();
     m_initialRetention = getRetention();
     connect(new GetConfigOperation(), &GetConfigOperation::finished,
             this, [this](ConfigOperation *op) {
diff --git a/kcm/kcm.h b/kcm/kcm.h
--- a/kcm/kcm.h
+++ b/kcm/kcm.h
@@ -78,6 +78,7 @@
 
     Q_INVOKABLE void forceSave();
     void doSave(bool force);
+    Q_INVOKABLE void revertSettings();
 
 Q_SIGNALS:
     void backendReadyChanged();
@@ -94,6 +95,8 @@
     void errorOnSave();
     void globalScaleWritten();
     void outputConnect(bool connected);
+    void settingsReverted();
+    void showRevertWarning();
 
 private:
     void setBackendReady(bool error);
@@ -109,6 +112,7 @@
     std::unique_ptr<ConfigHandler> m_config;
     bool m_backendReady = false;
     bool m_screenNormalized = true;
+    bool m_settingsReverted = false;
     double m_globalScale = 1.;
     double m_initialGlobalScale = 1.;
 
diff --git a/kcm/kcm.cpp b/kcm/kcm.cpp
--- a/kcm/kcm.cpp
+++ b/kcm/kcm.cpp
@@ -98,6 +98,21 @@
     doSave(false);
 }
 
+void KCMKScreen::revertSettings()
+{
+    if (!m_config) {
+        setNeedsSave(false);
+        return;
+    }
+    if (!m_settingsReverted) {
+        m_config->revert();
+        m_settingsReverted = true;
+        doSave(true);
+        load();  // reload the configuration
+        Q_EMIT settingsReverted();
+    }
+}
+
 void KCMKScreen::doSave(bool force)
 {
     if (!m_config) {
@@ -160,6 +175,13 @@
                 return;
             }
             m_config->updateInitialConfig();
+            if (!m_settingsReverted) {
+                // start the revert timer
+                Q_EMIT showRevertWarning();
+            } else {
+                // reset the revert flag
+                m_settingsReverted = false;
+            }
         }
     );
 }
diff --git a/kcm/package/contents/ui/main.qml b/kcm/package/contents/ui/main.qml
--- a/kcm/package/contents/ui/main.qml
+++ b/kcm/package/contents/ui/main.qml
@@ -17,6 +17,7 @@
 import QtQuick 2.9
 import QtQuick.Layouts 1.1
 import QtQuick.Controls 2.3 as Controls
+import QtQuick.Dialogs 1.3
 import org.kde.kirigami 2.4 as Kirigami
 
 import org.kde.kcm 1.2 as KCM
@@ -28,6 +29,7 @@
     implicitHeight: units.gridUnit * 38
 
     property int selectedOutput: 0
+    property int revertCountdown: 10
 
     ColumnLayout {
         Kirigami.InlineMessage {
@@ -86,6 +88,41 @@
             visible: false
             showCloseButton: true
         }
+        Kirigami.InlineMessage {
+            id: revertMsg
+            Layout.fillWidth: true
+            type: Kirigami.MessageType.Information
+            text: i18n("Settings are reverted to the previous state.")
+            visible: false
+            showCloseButton: true
+        }
+        Kirigami.InlineMessage {
+            id: confirmMsg
+            Layout.fillWidth: true
+            type: Kirigami.MessageType.Warning
+            visible: false
+            showCloseButton: false
+
+            actions: [
+                Kirigami.Action {
+                    iconName: "edit-undo"
+                    text: i18n("Undo")
+                    onTriggered: {
+                        confirmMsg.visible = false;
+                        kcm.revertSettings();
+                        revertTimer.stop();
+                    }
+                },
+                Kirigami.Action {
+                    iconName: "dialog-ok-apply"
+                    text: i18n("Keep")
+                    onTriggered: {
+                        confirmMsg.visible = false;
+                        revertTimer.stop();
+                    }
+                }
+            ]
+        }
 
         Connections {
             target: kcm
@@ -101,6 +138,16 @@
                 connectMsg.visible = true;
             }
             onBackendError: errBackendMsg.visible = true;
+            onSettingsReverted: {
+                revertMsg.visible = true;
+                confirmMsg.visible = false;
+            }
+            onShowRevertWarning: {
+                confirmMsg.text = i18n("Is your screen displaying correctly?")
+                confirmMsg.visible = true;
+                revertCountdown = 10;
+                revertTimer.restart();
+            }
 
             onChanged: {
                 dangerousSaveMsg.visible = false;
@@ -125,5 +172,25 @@
             enabled: kcm.outputModel && kcm.backendReady
             Layout.fillWidth: true
         }
+
+        Timer {
+            id: revertTimer
+            interval: 1000
+            running: false
+            repeat: true
+
+            onTriggered: {
+                if (revertCountdown < 1) {
+                    // stop the timer
+                    this.stop();
+                    // reset the settings
+                    kcm.revertSettings();
+                    return;
+                }
+                revertCountdown -= 1;
+                confirmMsg.text = i18np("Is your screen displaying correctly?<br><strong>Settings will be reverted in 1 second</strong>.",
+                "Is your screen displaying correctly?<br><strong>Settings will be reverted in %1 seconds</strong>.", revertCountdown);
+            }
+        }
     }
 }