Display Settings

Use Screen.Width and height and change Your forms sizes accordingly.
Play with Align and Anchor properties of controls

Well you could write a refresh/detect screen size

procedure getsize(sender : TObject);
  private
  public
  end;

procedure TForm1.getsize(sender : TObject);
begin
scry := screen.height;
scrx := screen.width;

  if scry = 640 then
    if scryx = 480 then
    begin
    //set your forms size correctly here
    end;

  if scry = 800 then
    if scryx = 600 then
    begin
    //set your forms size correctly here
    end;

  if scry = 1024 then
    if scryx = 768 then
    begin
    //set your forms size correctly here
    end;

end;

Or you could use the good suggestion that Mokule made "Align and Anchor properties of controls"

Peace Scay7

Hi it didn't work with me have you tried before

thanks

yes, I use it a lot.
It might be your form's position.
Try setting it to fpDefaultPosOnly

Thanks a lot RealLoki , you are great

regards