diff --git a/QtPMbrowser/PMparametersModel.cpp b/QtPMbrowser/PMparametersModel.cpp
index 9237df7..043ca32 100644
--- a/QtPMbrowser/PMparametersModel.cpp
+++ b/QtPMbrowser/PMparametersModel.cpp
@@ -1,6 +1,25 @@
 #include <QString>
+#include <QFont>
 #include "PMparametersModel.h"
 
+int PMparametersModel::countCheckedPrint() const
+{
+    int count{ 0 };
+    for (const auto& p : parameters) {
+        if (p.print) ++count;
+    }
+    return count;
+}
+
+int PMparametersModel::countCheckedExport() const
+{
+    int count{ 0 };
+    for (const auto& p : parameters) {
+        if (p.exportIBW) ++count;
+    }
+    return count;
+}
+
 PMparametersModel::PMparametersModel(QSpan<hkLib::PMparameter> p, QObject* parent)
 	: QAbstractTableModel(parent), parameters(p)
 {}
@@ -10,7 +29,7 @@ PMparametersModel::~PMparametersModel()
 
 int PMparametersModel::rowCount(const QModelIndex&) const
 {
-	return parameters.size();
+	return parameters.size() + 1;
 }
 
 int PMparametersModel::columnCount(const QModelIndex&) const
@@ -22,19 +41,54 @@ QVariant PMparametersModel::data(const QModelIndex& index, int role) const
 {
     int row = index.row();
     int col = index.column();
-    const auto& p = parameters[row];
-    switch (role) {
-    case Qt::CheckStateRole:
-        if (col == 0) {
-            return p.exportIBW ? Qt::Checked : Qt::Unchecked;
+    if (row == 0) {
+        switch (role) {
+        case Qt::CheckStateRole:
+        {
+            int N{ 0 };
+            if (col == 0) {
+                N = countCheckedExport();
+            }
+            else if (col == 1) {
+                N = countCheckedPrint();
+            }
+            if (N == 0) {
+                return Qt::Unchecked;
+            }
+            else if (N == parameters.size()) {
+                return Qt::Checked;
+            }
+            else {
+                return Qt::PartiallyChecked;
+            }
+        }
+            break;
+        case Qt::DisplayRole:
+            return QString::fromUtf8(lables.at(col));
+            break;
+        case Qt::FontRole:
+            QFont bf;
+            bf.setBold(true);
+            return bf;
+            break;
         }
-        else if (col == 1) {
-            return p.print ? Qt::Checked : Qt::Unchecked;
+    }
+    else {
+        --row;
+        const auto& p = parameters[row];
+        switch (role) {
+        case Qt::CheckStateRole:
+            if (col == 0) {
+                return p.exportIBW ? Qt::Checked : Qt::Unchecked;
+            }
+            else if (col == 1) {
+                return p.print ? Qt::Checked : Qt::Unchecked;
+            }
+            break;
+        case Qt::DisplayRole:
+            return QString::fromUtf8(lables.at(col));
+            break;
         }
-        break;
-    case Qt::DisplayRole:
-        return QString::fromUtf8(lables.at(col));
-        break;
     }
     return QVariant();
 }
@@ -42,11 +96,21 @@ QVariant PMparametersModel::data(const QModelIndex& index, int role) const
 QVariant PMparametersModel::headerData(int section, Qt::Orientation orientation, int role) const
 {
     if (role == Qt::DisplayRole && orientation == Qt::Vertical) {
-        return QString::fromUtf8(parameters[section].name);
+        if (section == 0) {
+            return QString("(All Parameters)");
+        }
+        else {
+            return QString::fromUtf8(parameters[section - 1].name);
+        }
     }
     else if (role == Qt::DisplayRole && orientation == Qt::Horizontal) {
         return QString::fromUtf8(lables.at(section));
     }
+    else if (role == Qt::FontRole && orientation == Qt::Vertical && section == 0) {
+        QFont bf;
+        bf.setBold(true);
+        return bf;
+    }
     return QVariant();
 }
 
@@ -55,13 +119,33 @@ bool PMparametersModel::setData(const QModelIndex& index, const QVariant& value,
     if (role == Qt::CheckStateRole) {
         if (!checkIndex(index))
             return false;
-        auto& p = parameters[index.row()];
         auto state = value.value<Qt::CheckState>();
+        int row = index.row();
+        if (row == 0) {
+            if (state == Qt::Checked || state == Qt::Unchecked) {
+                if (index.column() == 0) {
+                    for (auto& p : parameters) {
+                        p.exportIBW = state == Qt::Checked;
+                    }
+                }
+                else if (index.column() == 1) {
+                    for (auto& p : parameters) {
+                        p.print = state == Qt::Checked;
+                    }
+                }
+            }
+            else return false;
+            emit dataChanged(this->index(0, index.column()), this->index(parameters.size(), index.column()));
+            return true;
+        }
+        --row;
+        auto& p = parameters[row];
         if (index.column() == 0) {
             p.exportIBW = state != Qt::Unchecked;
         } else if (index.column() == 1) {
             p.print = state != Qt::Unchecked;
         }
+        emit dataChanged(this->index(0, index.column()), this->index(parameters.size(), index.column()));
         return true;
     }
     return false;
diff --git a/QtPMbrowser/PMparametersModel.h b/QtPMbrowser/PMparametersModel.h
index 41ba00e..91557ba 100644
--- a/QtPMbrowser/PMparametersModel.h
+++ b/QtPMbrowser/PMparametersModel.h
@@ -11,6 +11,8 @@ class PMparametersModel  : public QAbstractTableModel
 private:
 	static constexpr std::array<const char*, 2> lables{ "export", "print" };
 	QSpan<hkLib::PMparameter> parameters;
+	int countCheckedPrint() const;
+	int countCheckedExport() const;
 
 public:
 	explicit PMparametersModel(QSpan<hkLib::PMparameter> PMparameters, QObject *parent = nullptr);