_x_scale->SetRange (0, 1000);
_y_scale->SetRange (0, 1000);
_line_spacing->SetRange (0, 1000);
+ _z_position->SetRange (-100, 100);
_reference->Bind (wxEVT_CHECKBOX, boost::bind (&TextPanel::reference_clicked, this));
_use->Bind (wxEVT_CHECKBOX, boost::bind (&TextPanel::use_toggled, this));