diff --git a/QtScrcpy/dialog.cpp b/QtScrcpy/dialog.cpp
index c4a21a6..794accf 100644
--- a/QtScrcpy/dialog.cpp
+++ b/QtScrcpy/dialog.cpp
@@ -77,7 +77,6 @@ void Dialog::initUI()
 
     ui->formatBox->addItem("mp4");
     ui->formatBox->addItem("mkv");
-    ui->videoSizeBox->setCurrentIndex(0);
 }
 
 void Dialog::on_updateDevice_clicked()
diff --git a/QtScrcpy/dialog.ui b/QtScrcpy/dialog.ui
index 55bddf0..663f655 100644
--- a/QtScrcpy/dialog.ui
+++ b/QtScrcpy/dialog.ui
@@ -6,19 +6,19 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>639</width>
+    <width>685</width>
     <height>600</height>
    </rect>
   </property>
   <property name="minimumSize">
    <size>
-    <width>520</width>
+    <width>685</width>
     <height>0</height>
    </size>
   </property>
   <property name="maximumSize">
    <size>
-    <width>639</width>
+    <width>685</width>
     <height>16777215</height>
    </size>
   </property>
@@ -168,7 +168,7 @@
       <item row="0" column="4">
        <widget class="QLabel" name="label_6">
         <property name="text">
-         <string>format：</string>
+         <string>record format：</string>
         </property>
        </widget>
       </item>
diff --git a/QtScrcpy/videoform.cpp b/QtScrcpy/videoform.cpp
index 63cf458..adb8624 100644
--- a/QtScrcpy/videoform.cpp
+++ b/QtScrcpy/videoform.cpp
@@ -27,9 +27,11 @@ VideoForm::VideoForm(const QString& serial, quint16 maxSize, quint32 bitRate, co
     m_maxSize(maxSize),
     m_bitRate(bitRate)
 {    
-    ui->setupUi(this);    
+    ui->setupUi(this);
     initUI();
 
+    setWindowFlag(Qt::WindowStaysOnTopHint);
+
     m_server = new Server();
     m_frames.init();
     m_decoder.setFrames(&m_frames);