diff --git a/Src/nmNum/nmSubWxs/nmWxParaPropertyPebi.cpp b/Src/nmNum/nmSubWxs/nmWxParaPropertyPebi.cpp
index 7eb051f..f6e866b 100644
--- a/Src/nmNum/nmSubWxs/nmWxParaPropertyPebi.cpp
+++ b/Src/nmNum/nmSubWxs/nmWxParaPropertyPebi.cpp
@@ -258,6 +258,7 @@ void nmWxParaPropertyPebi::initUI_HelpBox()
 
     m_pHelpBox->setMaximumHeight(_resoSizeH(65));
     m_pHelpBox->setReadOnly(true);
+    m_pHelpBox->hide();
 }
 
 void nmWxParaPropertyPebi::refreshUIs(QStringList& listParas, bool bReserveOlds /*= true*/,