diff --git a/DSView/pv/dialogs/decoderoptionsdlg.cpp b/DSView/pv/dialogs/decoderoptionsdlg.cpp
index 6d8b1a5b..f06dba19 100644
--- a/DSView/pv/dialogs/decoderoptionsdlg.cpp
+++ b/DSView/pv/dialogs/decoderoptionsdlg.cpp
@@ -179,8 +179,8 @@ void DecoderOptionsDlg::load_options(view::DecodeTrace *trace)
 
     double sk = QGuiApplication::primaryScreen()->devicePixelRatio();
     int srcHeight = QGuiApplication::primaryScreen()->availableSize().height();
-    if (srcHeight > 700)
-        srcHeight = 700; 
+    if (srcHeight > 600)
+        srcHeight = 600; 
 
     if (h * sk > srcHeight)
     {
diff --git a/DSView/pv/dialogs/deviceoptions.cpp b/DSView/pv/dialogs/deviceoptions.cpp
index a07bef93..81140658 100755
--- a/DSView/pv/dialogs/deviceoptions.cpp
+++ b/DSView/pv/dialogs/deviceoptions.cpp
@@ -93,6 +93,7 @@ DeviceOptions::DeviceOptions(QWidget *parent, DevInst *dev_inst) :
 
     _mode_check.setInterval(100);
     _mode_check.start();   
+ 
 }
 
 DeviceOptions::~DeviceOptions(){
diff --git a/DSView/pv/mainframe.cpp b/DSView/pv/mainframe.cpp
index 0977b432..36bd26a6 100644
--- a/DSView/pv/mainframe.cpp
+++ b/DSView/pv/mainframe.cpp
@@ -206,7 +206,18 @@ void MainFrame::showNormal()
 void MainFrame::showMaximized()
 { 
     hide_border();
-    QFrame::showMaximized();
+
+#ifdef _WIN32
+    double sk = QGuiApplication::primaryScreen()->devicePixelRatio();
+    if (sk >= 1.5)
+    {
+        auto rect = QGuiApplication::primaryScreen()->availableGeometry();  
+        this->move(rect.left(), rect.top());
+        this->resize(rect.width(), rect.height());
+    }
+#endif
+
+    QFrame::showMaximized(); 
 }
 
 void MainFrame::showMinimized()
@@ -426,6 +437,7 @@ void MainFrame::readSettings()
 
       bool bReset = false;
 
+      //size from config is error
       if (right == 0)
       {
           bReset = true;