diff --git a/module/mifare.cpp b/module/mifare.cpp
index ffa2663..b132be5 100644
--- a/module/mifare.cpp
+++ b/module/mifare.cpp
@@ -845,7 +845,7 @@ bool Mifare::data_saveDataFile(const QString &filename, bool isBin)
             {
                 for(int j = 0; j < 16; j++)
                 {
-                    unsigned char Byt[2];
+                    unsigned char Byt[2] = {0x0, 0x0};
                     for(int k = 0; k < 2; k++)
                     {
                         tmp = dataList->at(i).at(j * 2 + k).toUpper();
@@ -889,7 +889,7 @@ bool Mifare::data_saveKeyFile(const QString &filename, bool isBin)
             {
                 for(int j = 0; j < 6; j++)
                 {
-                    unsigned char Byt[2];
+                    unsigned char Byt[2] = {0x0, 0x0};
                     for(int k = 0; k < 2; k++)
                     {
                         tmp = keyAList->at(i).at(j * 2 + k).toUpper();
@@ -902,7 +902,7 @@ bool Mifare::data_saveKeyFile(const QString &filename, bool isBin)
                 }
                 for(int j = 0; j < 6; j++)
                 {
-                    unsigned char Byt[2];
+                    unsigned char Byt[2] = {0x0, 0x0};
                     for(int k = 0; k < 2; k++)
                     {
                         tmp = keyBList->at(i).at(j * 2 + k).toUpper();
diff --git a/ui/mainwindow.cpp b/ui/mainwindow.cpp
index 5fcd3fc..c1c1769 100644
--- a/ui/mainwindow.cpp
+++ b/ui/mainwindow.cpp
@@ -567,6 +567,7 @@ void MainWindow::MF_widgetReset()
     {
         setTableItem(ui->MF_dataWidget, i, 0, "");
         setTableItem(ui->MF_dataWidget, i, 1, QString::number(i));
+        ui->MF_dataWidget->item(i, 1)->setCheckState(Qt::Checked);
         setTableItem(ui->MF_dataWidget, i, 2, "");
         ui->MF_RW_blockBox->addItem(QString::number(i));
     }
@@ -604,7 +605,7 @@ void MainWindow::uiInit()
     ui->MF_dataWidget->setHorizontalHeaderItem(2, new QTableWidgetItem(tr("Data")));
     ui->MF_dataWidget->verticalHeader()->setVisible(false);
     ui->MF_dataWidget->setColumnWidth(0, 35);
-    ui->MF_dataWidget->setColumnWidth(1, 35);
+    ui->MF_dataWidget->setColumnWidth(1, 55);
     ui->MF_dataWidget->setColumnWidth(2, 430);
 
     ui->MF_keyWidget->setColumnCount(3);
diff --git a/ui/mainwindow.ui b/ui/mainwindow.ui
index f3b3ef7..fe05683 100644
--- a/ui/mainwindow.ui
+++ b/ui/mainwindow.ui
@@ -180,25 +180,14 @@
              </spacer>
             </item>
             <item>
-             <widget class="QPushButton" name="MF_data2KeyBotton">
-              <property name="sizePolicy">
-               <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
-                <horstretch>0</horstretch>
-                <verstretch>0</verstretch>
-               </sizepolicy>
-              </property>
-              <property name="minimumSize">
-               <size>
-                <width>20</width>
-                <height>20</height>
-               </size>
-              </property>
-              <property name="maximumSize">
-               <size>
-                <width>20</width>
-                <height>20</height>
-               </size>
+             <widget class="QCheckBox" name="MF_checkAllBox">
+              <property name="text">
+               <string>All</string>
               </property>
+             </widget>
+            </item>
+            <item>
+             <widget class="QPushButton" name="MF_data2KeyBotton">
               <property name="text">
                <string>&gt;&gt;</string>
               </property>
@@ -206,24 +195,6 @@
             </item>
             <item>
              <widget class="QPushButton" name="MF_key2DataBotton">
-              <property name="sizePolicy">
-               <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
-                <horstretch>0</horstretch>
-                <verstretch>0</verstretch>
-               </sizepolicy>
-              </property>
-              <property name="minimumSize">
-               <size>
-                <width>20</width>
-                <height>20</height>
-               </size>
-              </property>
-              <property name="maximumSize">
-               <size>
-                <width>20</width>
-                <height>20</height>
-               </size>
-              </property>
               <property name="text">
                <string>&lt;&lt;</string>
               </property>
@@ -231,33 +202,8 @@
             </item>
             <item>
              <widget class="QPushButton" name="MF_fontButton">
-              <property name="sizePolicy">
-               <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
-                <horstretch>20</horstretch>
-                <verstretch>20</verstretch>
-               </sizepolicy>
-              </property>
-              <property name="minimumSize">
-               <size>
-                <width>20</width>
-                <height>20</height>
-               </size>
-              </property>
-              <property name="maximumSize">
-               <size>
-                <width>20</width>
-                <height>20</height>
-               </size>
-              </property>
-              <property name="font">
-               <font>
-                <family>Courier</family>
-                <weight>75</weight>
-                <bold>true</bold>
-               </font>
-              </property>
               <property name="text">
-               <string>F</string>
+               <string>Fonts</string>
               </property>
              </widget>
             </item>
@@ -674,14 +620,14 @@
                 <item row="0" column="0">
                  <widget class="QPushButton" name="MF_RW_readAllButton">
                   <property name="text">
-                   <string>Read All</string>
+                   <string>Read Selected</string>
                   </property>
                  </widget>
                 </item>
                 <item row="1" column="0">
                  <widget class="QPushButton" name="MF_RW_writeAllButton">
                   <property name="text">
-                   <string>Write All</string>
+                   <string>Write Selected</string>
                   </property>
                  </widget>
                 </item>
@@ -766,14 +712,14 @@
                 <item row="0" column="0">
                  <widget class="QPushButton" name="MF_UID_readAllButton">
                   <property name="text">
-                   <string>Read All</string>
+                   <string>Read Selected</string>
                   </property>
                  </widget>
                 </item>
                 <item row="1" column="0">
                  <widget class="QPushButton" name="MF_UID_writeAllButton">
                   <property name="text">
-                   <string>Write All</string>
+                   <string>Write Selected</string>
                   </property>
                  </widget>
                 </item>