diff --git a/mainwindow.ui b/mainwindow.ui
--- a/mainwindow.ui
+++ b/mainwindow.ui
@@ -436,46 +436,56 @@
          </widget>
         </item>
         <item>
-         <layout class="QVBoxLayout" name="verticalLayout_8">
-          <item>
-           <layout class="QHBoxLayout" name="horizontalLayout_3">
-            <item>
-             <widget class="QLabel" name="label_3">
-              <property name="text">
-               <string>Number Of Samples:</string>
-              </property>
-             </widget>
-            </item>
-            <item>
-             <widget class="QSpinBox" name="spNumOfSamples">
-              <property name="keyboardTracking">
-               <bool>false</bool>
-              </property>
-              <property name="minimum">
-               <number>2</number>
-              </property>
-              <property name="maximum">
-               <number>10000</number>
-              </property>
-              <property name="value">
-               <number>1000</number>
-              </property>
-             </widget>
-            </item>
-           </layout>
+         <layout class="QFormLayout" name="formLayout_2">
+          <property name="fieldGrowthPolicy">
+           <enum>QFormLayout::AllNonFixedFieldsGrow</enum>
+          </property>
+          <item row="2" column="1">
+           <widget class="QDoubleSpinBox" name="spYmax"/>
+          </item>
+          <item row="1" column="1">
+           <widget class="QDoubleSpinBox" name="spYmin">
+            <property name="value">
+             <double>1.000000000000000</double>
+            </property>
+           </widget>
           </item>
-          <item>
-           <spacer name="verticalSpacer_3">
-            <property name="orientation">
-             <enum>Qt::Vertical</enum>
+          <item row="0" column="1">
+           <widget class="QSpinBox" name="spNumOfSamples">
+            <property name="keyboardTracking">
+             <bool>false</bool>
+            </property>
+            <property name="minimum">
+             <number>2</number>
+            </property>
+            <property name="maximum">
+             <number>10000</number>
+            </property>
+            <property name="value">
+             <number>1000</number>
             </property>
-            <property name="sizeHint" stdset="0">
-             <size>
-              <width>20</width>
-              <height>40</height>
-             </size>
+           </widget>
+          </item>
+          <item row="0" column="0">
+           <widget class="QLabel" name="label_3">
+            <property name="text">
+             <string>Number Of Samples:</string>
             </property>
-           </spacer>
+           </widget>
+          </item>
+          <item row="1" column="0">
+           <widget class="QCheckBox" name="cbYmin">
+            <property name="text">
+             <string>Ymin</string>
+            </property>
+           </widget>
+          </item>
+          <item row="2" column="0">
+           <widget class="QCheckBox" name="cbYMax">
+            <property name="text">
+             <string>Ymax</string>
+            </property>
+           </widget>
           </item>
          </layout>
         </item>