Problem displaying my main window

[Salazaar]

Ok, so I create slot:

void MainWindow::on_actionAbout_triggered()
 
      {
 
         OtherDialog dlg( this );
 
         dlg.exec();
 
      }

void MainWindow::on_actionAbout_triggered()

      {

         OtherDialog dlg( this );

         dlg.exec();

      }

To copy to clipboard, switch view to plain text mode 

And, what's the next step?