add of fontSize and font functions

mainwindow.h

@@ -31,6 +31,8 @@ public:
     void setUnderline();
     void setColor();
     void setOverline();
+    void setSize();
+    void setFont();
 
 private slots:
     void on_pushButton_clicked();
@@ -58,6 +60,10 @@ private slots:
 
     void on_actionOverline_triggered();
 
+    void on_actionSize_triggered();
+
+    void on_actionFont_triggered();
+
 private:
     Ui::MainWindow *ui;
     QString currentFile;