diff --git a/NEWS.md b/NEWS.md
index 9f51aec6..afe847a0 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -7,6 +7,7 @@ Version 0.7.6
  - enhancement: correctly handle auto indents for statement span many lines;
  - enhancment: only use colors have good contrasts with the background in the class browser and code completion suggestion window
  - fix: bottom and left panel properties not correctly saved when hiding the main window
+ - fix: When debugging, if value of the variable pointed by the mouse cursor is too long, tooltip will fill the whole screen.
 
 Version 0.7.5
  - enhancement: more accurate auto indent calculation
diff --git a/RedPandaIDE/editor.cpp b/RedPandaIDE/editor.cpp
index fb62bc86..2e5fcc70 100644
--- a/RedPandaIDE/editor.cpp
+++ b/RedPandaIDE/editor.cpp
@@ -1506,7 +1506,13 @@ void Editor::onGutterClicked(Qt::MouseButton button, int , int , int line)
 void Editor::onTipEvalValueReady(const QString &value)
 {
     if (mCurrentWord == mCurrentDebugTipWord) {
-        QToolTip::showText(QCursor::pos(), mCurrentDebugTipWord + " = " + value );
+        QString newValue;
+        if (value.length()>100) {
+            newValue = value.left(100) + "...";
+        } else {
+            newValue = value;
+        }
+        QToolTip::showText(QCursor::pos(), mCurrentDebugTipWord + " = " + newValue);
     }
     disconnect(pMainWindow->debugger(), &Debugger::evalValueReady,
                this, &Editor::onTipEvalValueReady);
diff --git a/RedPandaIDE/mainwindow.ui b/RedPandaIDE/mainwindow.ui
index 39aa6801..11353278 100644
--- a/RedPandaIDE/mainwindow.ui
+++ b/RedPandaIDE/mainwindow.ui
@@ -1159,6 +1159,8 @@
    <addaction name="actionRun"/>
    <addaction name="actionCompile_Run"/>
    <addaction name="actionRebuild"/>
+   <addaction name="separator"/>
+   <addaction name="actionRun_Parameters"/>
   </widget>
   <widget class="QToolBar" name="toolbarDebug">
    <property name="windowTitle">