"panel3" not found in same unit-SOLVED

Question

I wrote a program in Lazarus 3.2 with a few panels,all in the same unit. I want to display one at a time,so I want to hide the others with a procedure. I got error messages: identifier not found "panel 3" identifier not found "panel 6" below is the code:

procedure HidePanels;
begin
    panel2.hide;
    panel3.hide;
    panel6.hide;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
    HidePanels;
    panel2.left:=120;
    panel2.top:=8;
    panel2.show;
end;

Thanks in advance for your help.

if I put the code line from the HidePnels proceddure in each procedure that needs to hide other panels, the code works, but that's more code than I should have.

Made one change in HidePanels procdeure and it works:

change panel2.hide; to Form1.panel2.hide;

since it's part of form1

should work with other resources, too.