diff --git a/main.ui b/main.ui
index 4bb1c0f..3f61ceb 100644
--- a/main.ui
+++ b/main.ui
@@ -109,14 +109,14 @@
        </property>
       </widget>
      </item>
-     <item row="6" column="0">
+     <item row="7" column="0">
       <widget class="QLabel" name="label_6">
        <property name="text">
         <string>Horizontal Scale:</string>
        </property>
       </widget>
      </item>
-     <item row="6" column="1">
+     <item row="7" column="1">
       <layout class="QHBoxLayout" name="horizontalLayout_3">
        <item>
         <widget class="QSlider" name="horizontalScale">
@@ -146,14 +146,14 @@
        </item>
       </layout>
      </item>
-     <item row="7" column="0">
+     <item row="8" column="0">
       <widget class="QLabel" name="label_7">
        <property name="text">
         <string>Vertical Scale:</string>
        </property>
       </widget>
      </item>
-     <item row="7" column="1">
+     <item row="8" column="1">
       <layout class="QHBoxLayout" name="horizontalLayout_2">
        <item>
         <widget class="QSlider" name="verticalScale">
@@ -183,6 +183,32 @@
        </item>
       </layout>
      </item>
+     <item row="6" column="0">
+      <widget class="QLabel" name="label_5">
+       <property name="text">
+        <string>Scaling mode:</string>
+       </property>
+      </widget>
+     </item>
+     <item row="6" column="1">
+      <widget class="QComboBox" name="scaleModeCombo">
+       <item>
+        <property name="text">
+         <string>Manual</string>
+        </property>
+       </item>
+       <item>
+        <property name="text">
+         <string>Automatic: physical dimensions</string>
+        </property>
+       </item>
+       <item>
+        <property name="text">
+         <string>Manual, same in both dimensions</string>
+        </property>
+       </item>
+      </widget>
+     </item>
     </layout>
    </item>
    <item>