diff --git a/NEWS.md b/NEWS.md
index 8d2187a8..b855d159 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -2,6 +2,7 @@ Red Panda C++ Version 1.0.1
   - fix: only convert project icon file when it's filename doesn't end with ".ico"
   - fix: hide function tip when scroll
   - fix: short cut for goto definition/declaration doesn't work
+  - enhancement: press alt to switch to column selection mode while selection by mouse dragging in editor
 
 Red Panda C++ Version 1.0.0
   - fix: calculation for code snippets's tab stop positions is not correct
diff --git a/RedPandaIDE/mainwindow.ui b/RedPandaIDE/mainwindow.ui
index fa12f372..f8346300 100644
--- a/RedPandaIDE/mainwindow.ui
+++ b/RedPandaIDE/mainwindow.ui
@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>1114</width>
-    <height>742</height>
+    <height>627</height>
    </rect>
   </property>
   <property name="windowTitle">
diff --git a/RedPandaIDE/qsynedit/SynEdit.cpp b/RedPandaIDE/qsynedit/SynEdit.cpp
index 63765912..811717b7 100644
--- a/RedPandaIDE/qsynedit/SynEdit.cpp
+++ b/RedPandaIDE/qsynedit/SynEdit.cpp
@@ -6063,6 +6063,10 @@ void SynEdit::mouseMoveEvent(QMouseEvent *event)
             //BeginDrag(false);
         }
     } else if ((buttons == Qt::LeftButton)) {
+        if (event->modifiers() == Qt::AltModifier)
+            setSelectionMode(SynSelectionMode::smColumn);
+        else
+            setSelectionMode(SynSelectionMode::smNormal);
         // should we begin scrolling?
         //computeScroll(X, Y,false);
 //        DisplayCoord P = pixelsToNearestRowColumn(X, Y);