Currency symbol to show

I have searched the KB and could not find… I am doing my own project and not using any of the ERP tables.
So I have managed to show the currency Symbol when printing but it does not work when showing a GRID or when editing the record. How can I add this when the GRID loads?
Used the same approach I saw on the codes of ERP like
added the company field to the Doctype and on the currency field add on options Empresa:nome_empresa:currency_def
when loading the form I do cur_frm.add_fetch(“nome_mesa”,“nome_empresa”,“empresa”)