Word wrap in custom field

I create a custom field of TextSingle in RTFM. When I display the article, the text in the field becomes a long line and does not wrap itself. How can I have it wrapped automatically?



Take the MTR. Enjoy More Time For Life.

*** Email Disclaimer ***
The information contained in this e-mail is confidential and is intended solely for the addressee. If you are not the intended recipient, please notify the sender immediately and delete this e-mail from your system. Any unauthorised use, disclosure, copying, printing, forwarding or dissemination of any part of this information is prohibited. MTR Corporation Limited does not accept responsibility for the content of any e-mail transmitted by its staff for any reason other than bona fide business purposes. Any information that is not transmitted via secure, tamper-proof technology should not be relied upon, unless advised or agreed otherwise in writing by an authorised representative of the Corporation.
*** End of Disclaimer ***