Remove (no value) from drop down list

I created a custom field of type ‘Select one value’(i.e. a dropdown menu).
At the top of the menu is a (no value) option. How do I get rid of this?
Many thanks in advance.

Hi

You either use a scrip to set default value if user didn’t pick any (i
believe there is such on the wiki) or you use callbacks to preset default
and make cf mandatory with paternal through UI.

Regards, Ruslan. From phone.2010 10 26 22:15 пользователь “Jason Edgar” superjuke@gmail.com написал:

I created a custom field of type ‘Select one value’(i.e. a dropdown menu).
At the top of the menu is a (no value) option. How do I get rid of this?
Many thanks in advance.

Visiting this issue 15 years on, as the original answer was a bit confusing or maybe simply because RT changed.

To remove (no value), in RT5 the CustomField validation must be set to Mandatory. No other actions appear to be necessary. To verify this is in effect, do NOT reload the ticket page as this appears not to refresh certain options such as the default value, click on Create Ticket instead.