Change a Single-Line Text field into a Multi-line Field w/o data loss

Change a Single-Line Text field into a Multi-line Field w/o data loss

Is it possible to change a Single-Line Text field into a Multi-line Field without losing data.

I have a form with data for which I would like to change a single-line field into a multi-line field but I'm worried it might delete the pre-existing data.

Thanks.