diff --git a/src/doctor/doctor.h b/src/doctor/doctor.h
--- a/src/doctor/doctor.h
+++ b/src/doctor/doctor.h
@@ -51,6 +51,7 @@
 
     bool setEnabled(int id, bool enabled);
     bool setPosition(int id, const QPoint &pos);
+    bool setScale(int id, int scale);
     bool setMode(int id, const QString &mode_id);
 
 Q_SIGNALS:
diff --git a/src/doctor/doctor.cpp b/src/doctor/doctor.cpp
--- a/src/doctor/doctor.cpp
+++ b/src/doctor/doctor.cpp
@@ -223,7 +223,17 @@
                         return;
                     }
                     qCDebug(KSCREEN_DOCTOR) << "Output" << output_id << "set mode" << mode_id;
-
+                } else if (ops.count() == 4 && ops[2] == QStringLiteral("scale")) {
+                    int scale = ops[3].toInt(&ok);
+                    if (!ok || scale < 1) {
+                        cerr << "Unable to parse scale" << ops[3] << endl;
+                        qApp->exit(5);
+                        return;
+                    }
+                    if (!setScale(output_id, scale)) {
+                        qApp->exit(1);
+                        return;
+                    }
                 } else if (ops.count() == 4 && ops[2] == QStringLiteral("position")) {
                     QStringList _pos = ops[3].split(',');
                     if (_pos.count() != 2) {
@@ -391,6 +401,25 @@
     return false;
 }
 
+bool Doctor::setScale(int id, const int scale)
+{
+    if (!m_config) {
+        qCWarning(KSCREEN_DOCTOR) << "Invalid config.";
+        return false;
+    }
+
+    Q_FOREACH (const auto &output, m_config->outputs()) {
+        if (output->id() == id) {
+            qCDebug(KSCREEN_DOCTOR) << "Set scale position" << scale;
+            output->setScale(scale);
+            m_changed = true;
+            return true;
+        }
+    }
+    cout << "Output with id " << id << " not found." << endl;
+    return false;
+}
+
 bool Doctor::setMode(int id, const QString &mode_id)
 {
     if (!m_config) {