I have added several custom multiline fields (Plain text) in the Zoho CRM module "Accounts" before the Rich Text (RTF) feature was released in 2024. 

Now I am looking for a way to convert them to Rich Text format. Is there a way to do this? 

The problem is I use a function to combine several single fields into these multiline fields. The values are split by a "<br />" to force a line break (that works fine in the Rich text fields). If I use "\n" on the Plain text fields there is no line break. Instead I get "Sample Avenue 123\n 11120 City". 

Thanks for your help.