diff --git a/NEWS.md b/NEWS.md
index a0cbbe07..714ee169 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -29,6 +29,7 @@ Red Panda C++ Version 2.26
   - fix: Line numbers for problem case input/output/expected texteditors are not vertically centered.
   - enhancement: E-ink color scheme.
   - fix: Use the system default encoding for input when running problem cases.
+  - change: Use qt.conf to set the font engine. User can use the windows default font engine by remove this file.
 
 Red Panda C++ Version 2.25
 
diff --git a/RedPandaIDE/main.cpp b/RedPandaIDE/main.cpp
index 64a82488..e54bc137 100644
--- a/RedPandaIDE/main.cpp
+++ b/RedPandaIDE/main.cpp
@@ -250,11 +250,11 @@ void setTheme(const QString& theme) {
 
 int main(int argc, char *argv[])
 {
-#ifdef Q_OS_WINDOWS
-    // Make title bar and palette follow system-wide dark mode setting on recent Windows releases.
-    // Use freetype as the fontengine
-    qputenv("QT_QPA_PLATFORM", "windows:darkmode=2:fontengine=freetype");
-#endif
+//#ifdef Q_OS_WINDOWS
+//    // Make title bar and palette follow system-wide dark mode setting on recent Windows releases.
+//    // Use freetype as the fontengine
+//    qputenv("QT_QPA_PLATFORM", "windows:darkmode=2:fontengine=freetype");
+//#endif
 
 #ifdef Q_OS_MACOS
     // in macOS GUI apps, `/usr/local/bin` is not in PATH by default
diff --git a/libs/qsynedit/qsynedit/qsynedit.cpp b/libs/qsynedit/qsynedit/qsynedit.cpp
index 29af1fa4..fe81de51 100644
--- a/libs/qsynedit/qsynedit/qsynedit.cpp
+++ b/libs/qsynedit/qsynedit/qsynedit.cpp
@@ -6239,7 +6239,7 @@ void QSynEdit::mouseReleaseEvent(QMouseEvent *event)
     int X=event->pos().x();
     /* int Y=event->pos().y(); */
 
-    if (!mMouseMoved && (X < mGutterWidth + 2)) {
+    if (!mMouseMoved && (X <= mGutterWidth )) {
         processGutterClick(event);
     }
 
@@ -6295,7 +6295,7 @@ void QSynEdit::mouseDoubleClickEvent(QMouseEvent *event)
 {
     QAbstractScrollArea::mouseDoubleClickEvent(event);
     QPoint ptMouse = event->pos();
-    if (ptMouse.x() >= mGutterWidth + 2) {
+    if (ptMouse.x() >= mGutterWidth) {
         if (mOptions.testFlag(EditorOption::eoSelectWordByDblClick))
             setSelWord();
         mStateFlags.setFlag(StateFlag::sfDblClicked);
diff --git a/packages/msys/build-clang.sh b/packages/msys/build-clang.sh
index 774d8130..8a6f510f 100644
--- a/packages/msys/build-clang.sh
+++ b/packages/msys/build-clang.sh
@@ -57,6 +57,8 @@ pushd .
 cd "${PACKAGE_DIR}"
 ln -s "${MINGW}" $MinGW_NAME
 
+cp "${SOURCE_DIR}/platform/windows/qt.conf" .
+
 cp "${SOURCE_DIR}/windows/installer-scripts/lang.nsh" .
 cp "${SOURCE_DIR}/windows/installer-scripts/redpanda-clang.nsi" .
 
diff --git a/packages/msys/build-i686.sh b/packages/msys/build-i686.sh
index 5a6b4a79..2d8a3384 100644
--- a/packages/msys/build-i686.sh
+++ b/packages/msys/build-i686.sh
@@ -29,6 +29,8 @@ echo "Making no-compiler installer ..."
 pushd .
 cd "${PACKAGE_DIR}"
 
+cp "${SOURCE_DIR}/platform/windows/qt.conf" .
+
 cp "${SOURCE_DIR}/platform/windows/installer-scripts/lang.nsh" .
 cp "${SOURCE_DIR}/platform/windows/installer-scripts/redpanda-i686-nocompiler.nsi" .
 
diff --git a/packages/msys/build-x64.sh b/packages/msys/build-x64.sh
index 3d2b9835..c782c537 100644
--- a/packages/msys/build-x64.sh
+++ b/packages/msys/build-x64.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-TARGET_DIR="/r/"
+TARGET_DIR="/z/"
 BUILD_DIR="${TEMP}/redpandacpp-build"
 PACKAGE_DIR="${TEMP}/RedPanda-CPP"
 GCC_DIR="/mingw64"
@@ -29,6 +29,8 @@ echo "Making no-compiler installer ..."
 pushd .
 cd "${PACKAGE_DIR}"
 
+cp "${SOURCE_DIR}/platform/windows/qt.conf" .
+
 cp "${SOURCE_DIR}/platform/windows/installer-scripts/lang.nsh" .
 cp "${SOURCE_DIR}/platform/windows/installer-scripts/redpanda-nocompiler.nsi" .
 
diff --git a/packages/msys/build-xp.sh b/packages/msys/build-xp.sh
index da08822b..4fd5b7fd 100644
--- a/packages/msys/build-xp.sh
+++ b/packages/msys/build-xp.sh
@@ -33,6 +33,8 @@ echo "Making no-compiler installer ..."
 pushd .
 cd "${PACKAGE_DIR}"
 
+cp "${SOURCE_DIR}/platform/windows/qt.conf" .
+
 cp "${SOURCE_DIR}/platform/windows/installer-scripts/lang.nsh" .
 cp "${SOURCE_DIR}/platform/windows/installer-scripts/redpanda-i686-nocompiler.nsi" .
 
diff --git a/platform/windows/installer-scripts/redpanda-clang.nsi b/platform/windows/installer-scripts/redpanda-clang.nsi
index e1b734f7..dcb4c56a 100644
--- a/platform/windows/installer-scripts/redpanda-clang.nsi
+++ b/platform/windows/installer-scripts/redpanda-clang.nsi
@@ -93,6 +93,7 @@ Section "$(SectionMainName)" SectionMain
   File "LICENSE"
   File "NEWS.md"
   File "README.md"
+  File "qt.conf"
   
   ; Write required paths
   SetOutPath $INSTDIR\Templates
@@ -464,6 +465,7 @@ Section "Uninstall"
   Delete "$INSTDIR\astyle.exe"
   Delete "$INSTDIR\LICENSE"
   Delete "$INSTDIR\README.md"
+  Delete "$INSTDIR\qt.conf"
 
   RMDir /r "$INSTDIR\Lang"
   RMDir /r "$INSTDIR\Templates"
diff --git a/platform/windows/installer-scripts/redpanda-i686-nocompiler.nsi b/platform/windows/installer-scripts/redpanda-i686-nocompiler.nsi
index 95bc6e96..620ec87f 100644
--- a/platform/windows/installer-scripts/redpanda-i686-nocompiler.nsi
+++ b/platform/windows/installer-scripts/redpanda-i686-nocompiler.nsi
@@ -93,6 +93,7 @@ Section "$(SectionMainName)" SectionMain
   File "LICENSE"
   File "NEWS.md"
   File "README.md"
+  File "qt.conf"
   
   ; Write required paths
   SetOutPath $INSTDIR\Templates
@@ -456,6 +457,7 @@ Section "Uninstall"
   Delete "$INSTDIR\astyle.exe"
   Delete "$INSTDIR\LICENSE"
   Delete "$INSTDIR\README.md"
+  Delete "$INSTDIR\qt.conf"  
 
   RMDir /r "$INSTDIR\Lang"
   RMDir /r "$INSTDIR\Templates"
diff --git a/platform/windows/installer-scripts/redpanda-i686.nsi b/platform/windows/installer-scripts/redpanda-i686.nsi
index 26040c82..6ef00e16 100644
--- a/platform/windows/installer-scripts/redpanda-i686.nsi
+++ b/platform/windows/installer-scripts/redpanda-i686.nsi
@@ -93,6 +93,7 @@ Section "$(SectionMainName)" SectionMain
   File "LICENSE"
   File "NEWS.md"
   File "README.md"
+  File "qt.conf"
   
   ; Write required paths
   SetOutPath $INSTDIR\Templates
@@ -462,6 +463,8 @@ Section "Uninstall"
   Delete "$INSTDIR\astyle.exe"
   Delete "$INSTDIR\LICENSE"
   Delete "$INSTDIR\README.md"
+  Delete "$INSTDIR\qt.conf"
+
 
   RMDir /r "$INSTDIR\Lang"
   RMDir /r "$INSTDIR\Templates"
diff --git a/platform/windows/installer-scripts/redpanda-nocompiler.nsi b/platform/windows/installer-scripts/redpanda-nocompiler.nsi
index 9f1e9d67..334838b0 100644
--- a/platform/windows/installer-scripts/redpanda-nocompiler.nsi
+++ b/platform/windows/installer-scripts/redpanda-nocompiler.nsi
@@ -92,6 +92,7 @@ Section "$(SectionMainName)" SectionMain
   File "LICENSE"
   File "NEWS.md"
   File "README.md"
+  File "qt.conf"
   
   ; Write required paths
   SetOutPath $INSTDIR\Templates
@@ -455,6 +456,7 @@ Section "Uninstall"
   Delete "$INSTDIR\astyle.exe"
   Delete "$INSTDIR\LICENSE"
   Delete "$INSTDIR\README.md"
+  Delete "$INSTDIR\qt.conf"
 
   RMDir /r "$INSTDIR\Lang"
   RMDir /r "$INSTDIR\Templates"
diff --git a/platform/windows/installer-scripts/redpanda-x64.nsi b/platform/windows/installer-scripts/redpanda-x64.nsi
index e74940cd..83891f2a 100644
--- a/platform/windows/installer-scripts/redpanda-x64.nsi
+++ b/platform/windows/installer-scripts/redpanda-x64.nsi
@@ -94,6 +94,7 @@ Section "$(SectionMainName)" SectionMain
   File "LICENSE"
   File "NEWS.md"
   File "README.md"
+  File "qt.conf"
   
   ; Write required paths
   SetOutPath $INSTDIR\Templates
@@ -465,6 +466,7 @@ Section "Uninstall"
   Delete "$INSTDIR\astyle.exe"
   Delete "$INSTDIR\LICENSE"
   Delete "$INSTDIR\README.md"
+  Delete "$INSTDIR\qt.conf"
 
   RMDir /r "$INSTDIR\Lang"
   RMDir /r "$INSTDIR\Templates"