diff --git a/plugins/EnergyScan_TBT.form b/plugins/EnergyScan_TBT.form
index 4213377..37b3c83 100644
--- a/plugins/EnergyScan_TBT.form
+++ b/plugins/EnergyScan_TBT.form
@@ -314,6 +314,11 @@
           </Properties>
         </Component>
         <Component class="javax.swing.JSpinner" name="spinnerMag">
+          <Properties>
+            <Property name="model" type="javax.swing.SpinnerModel" editor="org.netbeans.modules.form.editors2.SpinnerModelEditor">
+              <SpinnerModel initial="1.0" maximum="2.0" minimum="-2.0" numberType="java.lang.Double" stepSize="0.1" type="number"/>
+            </Property>
+          </Properties>
         </Component>
         <Component class="javax.swing.JLabel" name="jLabel16">
           <Properties>
diff --git a/plugins/EnergyScan_TBT.java b/plugins/EnergyScan_TBT.java
index 9cb73ee..ccde9ee 100644
--- a/plugins/EnergyScan_TBT.java
+++ b/plugins/EnergyScan_TBT.java
@@ -286,6 +286,8 @@ public class EnergyScan_TBT extends Panel {
         buttonGroupPlot.add(radioK3);
         radioK3.setText("K2 / K3");
 
+        spinnerMag.setModel(new javax.swing.SpinnerNumberModel(1.0d, -2.0d, 2.0d, 0.1d));
+
         jLabel16.setText("B(T)");
 
         javax.swing.GroupLayout panelParametersLayout = new javax.swing.GroupLayout(panelParameters);