diff --git a/include/maskfld.cpp b/include/maskfld.cpp
index 99cdf07f9..6bd6fa4c3 100755
--- a/include/maskfld.cpp
+++ b/include/maskfld.cpp
@@ -588,13 +588,12 @@ void TMask_field::set(const char* s)
 
 TString& TMask_field::get() const
 {
-  static TString256 gpark;
-
+  static TString gpark;
   if (mask().is_running())
     gpark = get_window_data();
   else
     gpark = get_field_data();
-
+  
   if (_flags.trim) gpark.trim();
   return gpark;
 }
@@ -3729,9 +3728,15 @@ void TZoom_field::set_window_data( const char* data )
 
 const char* TZoom_field::get_window_data( ) const
 {
-  TToken_string newmemo( _memo );
-  newmemo.add( TEdit_field::get_window_data( ), 0 );
-  return newmemo;
+  TToken_string& m = (TToken_string&)_memo;
+  const int pos = m.find('\n');
+  TString park; 
+  if (pos >= 0)
+    park=&(m[pos+1]);
+  m = TEdit_field::get_window_data();
+  if (pos >= 0 )
+    m << '\n' << park;
+  return _memo;
 } 
 
 void TZoom_field::set_field_data( const char* data )
@@ -3756,13 +3761,29 @@ bool TZoom_field::on_key( KEY key )
       m.set( 101, _memo );
       if ( m.run( ) != K_ESC )
       {
-        _memo = m.get( 101 );
-        set_window_data( get_first_line( ) );
+        _memo = m.get(101);
+        TString line(get_first_line());
+        if (line.len() > size()) line.cut(size());
+        set_window_data( line );
       }
    }
    return TEdit_field::on_key( key );
 } 
 
+void TZoom_field::enable(bool on)
+{
+  TEdit_field::enable(on);
+  if (_buttonzoom != NULL_WIN)
+    xvt_vobj_set_visible(_buttonzoom, on && shown());
+}
+
+void TZoom_field::show(bool on)
+{
+  TEdit_field::show(on);
+  if (_buttonzoom != NULL_WIN)
+    xvt_vobj_set_visible(_buttonzoom, on && enabled());
+}
+
 TZoom_field::TZoom_field( TMask* mask ) : TEdit_field( mask ), _memo( "", '\n' )
 {
   
@@ -3783,7 +3804,13 @@ void TZoom_field::set_first_line( const char * c )
 {
   TToken_string gfl( c, '\n' );
   TString spark( gfl.get( 0 ) );
-  _memo.add( spark, 0 );
+  TString park; 
+  const int pos = _memo.find('\n');
+  if (pos >= 0)
+    park=&(_memo[pos+1]);
+  _memo = spark;
+  if (pos >= 0 )
+    _memo << '\n' << park;
   // _memo.destroy( 1 );
 }
 
diff --git a/include/maskfld.h b/include/maskfld.h
index e794b7b05..fb9fd2b5b 100755
--- a/include/maskfld.h
+++ b/include/maskfld.h
@@ -1031,7 +1031,7 @@ protected:
   virtual bool on_key(KEY k);
 
   // @access Public Member
-public:
+public: 
   // @cmember Costruttore
   TMemo_field(TMask* mask);
   // @cmember Distruttore
@@ -1080,6 +1080,10 @@ protected:
   
   // @access Public Member
 public:
+  // @cmember Permette di rendere visibile/invisibile un campo (vedi <mf TEdit_field::show>)
+  virtual void show(bool on = TRUE);
+  // @cmember Abilita/disabilita il campo (lo rende scrivibile) (vedi <mf TEdit_field::enable>)
+  virtual void enable(bool on = TRUE);
   // @cmember Gestisce la pressione del tasto (TRUE se la gestione ha avuto successo)
   const char * get_first_line( );
   virtual bool on_key(KEY key);