Index: src/sas/qtgui/Utilities/UI/AddMultEditorUI.ui
===================================================================
--- src/sas/qtgui/Utilities/UI/AddMultEditorUI.ui	(revision 01ef3f797e8d4032a84fb98c0186de9326036df9)
+++ src/sas/qtgui/Utilities/UI/AddMultEditorUI.ui	(revision 01ef3f797e8d4032a84fb98c0186de9326036df9)
@@ -0,0 +1,174 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>AddMultEditorUI</class>
+ <widget class="QDialog" name="AddMultEditorUI">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>527</width>
+    <height>331</height>
+   </rect>
+  </property>
+  <property name="sizePolicy">
+   <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
+    <horstretch>0</horstretch>
+    <verstretch>0</verstretch>
+   </sizepolicy>
+  </property>
+  <property name="minimumSize">
+   <size>
+    <width>527</width>
+    <height>331</height>
+   </size>
+  </property>
+  <property name="windowTitle">
+   <string>Easy Add/Multiply Editor</string>
+  </property>
+  <layout class="QGridLayout" name="gridLayout_3">
+   <item row="1" column="0">
+    <widget class="QGroupBox" name="groupBox_5">
+     <property name="title">
+      <string>Description</string>
+     </property>
+     <layout class="QGridLayout" name="gridLayout_4">
+      <item row="0" column="0">
+       <widget class="QLineEdit" name="txtDescription">
+        <property name="placeholderText">
+         <string>Enter a description of the model (optional)</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item row="0" column="0">
+    <widget class="QGroupBox" name="groupBox_6">
+     <property name="title">
+      <string>Plugin model</string>
+     </property>
+     <layout class="QGridLayout" name="gridLayout_5">
+      <item row="0" column="0">
+       <widget class="QLineEdit" name="txtName">
+        <property name="toolTip">
+         <string>Sum / Multiply model function name.</string>
+        </property>
+        <property name="placeholderText">
+         <string>Enter a plugin name</string>
+        </property>
+       </widget>
+      </item>
+      <item row="0" column="1">
+       <widget class="QCheckBox" name="chkOverwrite">
+        <property name="toolTip">
+         <string>Check to overwrite the existing model with the same name.</string>
+        </property>
+        <property name="text">
+         <string>Overwrite existing model</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item row="3" column="0">
+    <widget class="QGroupBox" name="groupBox">
+     <property name="title">
+      <string>Model selection</string>
+     </property>
+     <layout class="QGridLayout" name="gridLayout_2">
+      <item row="0" column="0">
+       <layout class="QGridLayout" name="gridLayout">
+        <item row="0" column="0">
+         <widget class="QLabel" name="label">
+          <property name="text">
+           <string>model_1</string>
+          </property>
+         </widget>
+        </item>
+        <item row="0" column="2">
+         <widget class="QLabel" name="label_2">
+          <property name="text">
+           <string>model_2</string>
+          </property>
+         </widget>
+        </item>
+        <item row="1" column="0">
+         <widget class="QComboBox" name="cbModel1">
+          <property name="editable">
+           <bool>true</bool>
+          </property>
+         </widget>
+        </item>
+        <item row="1" column="1">
+         <widget class="QComboBox" name="cbOperator">
+          <property name="sizePolicy">
+           <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
+            <horstretch>0</horstretch>
+            <verstretch>0</verstretch>
+           </sizepolicy>
+          </property>
+          <property name="toolTip">
+           <string>Add: +
+Multiply: *</string>
+          </property>
+          <item>
+           <property name="text">
+            <string>+</string>
+           </property>
+          </item>
+          <item>
+           <property name="text">
+            <string>*</string>
+           </property>
+          </item>
+         </widget>
+        </item>
+        <item row="1" column="2">
+         <widget class="QComboBox" name="cbModel2">
+          <property name="editable">
+           <bool>true</bool>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item row="4" column="0">
+    <layout class="QHBoxLayout" name="horizontalLayout_3">
+     <item>
+      <spacer name="horizontalSpacer_2">
+       <property name="orientation">
+        <enum>Qt::Horizontal</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>40</width>
+         <height>20</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+     <item>
+      <widget class="QDialogButtonBox" name="buttonBox">
+       <property name="standardButtons">
+        <set>QDialogButtonBox::Apply|QDialogButtonBox::Close|QDialogButtonBox::Help</set>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item row="2" column="0">
+    <widget class="QLabel" name="lblEquation">
+     <property name="text">
+      <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Plugin_model = scale_factor * (model_1 + model_2) + background&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>
