> For the complete documentation index, see [llms.txt](https://help.workdigital.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.workdigital.io/custom-database-apps/columns/column-types/phone-fax-no..md).

# Phone/Fax No.

Additional option for Phone/Fax No. fields:

* Required: Enable checkbox if field cannot be left empty.
