--- a/eric7/UI/Previewers/PreviewerQSS.ui	Sun Dec 19 17:58:08 2021 +0100
+++ b/eric7/UI/Previewers/PreviewerQSS.ui	Sun Dec 19 17:58:43 2021 +0100
@@ -69,6 +69,9 @@
              <property name="title">
               <string>Enabled</string>
              </property>
+             <property name="checkable">
+              <bool>true</bool>
+             </property>
              <layout class="QVBoxLayout" name="verticalLayout_4">
               <item>
                <layout class="QGridLayout" name="gridLayout_4">