vBulletin Manual - Modifying Existing Custom Profile Fields

Editing a profile field follows the same procedures as adding a profile field. Navigate to User Profile Fields->User Profile Field Manager and select <Edit> next to the field you wish to edit.

There are a few points that you must consider when modifying an existing custom profile field.

The first is that profile fields are limited in what other field types that they can be converted to.

Single-Line Text box can be converted to a Multiple-Line Text box and vice versa
Multi-Selection Checkbox can be converted to a Multi-Selection Menu and Vice Versa

Any other conversions are not supported.

Secondly, a special form is required when modifying the user choices in the two Multi-Selection fields.

If you wish to add, delete or change the order of the options of a Multiple-Selection Menu or a Multiple-Selection Checkbox you will see the option Fields with a button labeled [Modify]. Pressing the [Modify] will present you with a screen like the following:

To move an item up in the list, press the up arrow to the left of the item and to move an item down press the down arrow to the left of the item.

To rename or delete an item, choose the appropriate <link> to the right of the item.

To add a new choice to the list, enter the name of the choice in the box labeled Name and select where you want the new item to appear by changing the value of Position.