if you display an additional field and leave it blank, the field is not displayed when you return to the contact edit screen. you must enter information into the field in order for it to continue to display on the contact edit screen.
to display additional contact fields:
1. tap the plus button on the lower-right corner of the contact edit screen.
2. select the field you want displayed. the fields appear in a preset order on the contact edit screen.
each field type can be displayed a certain number of times on the contact edit screen; for example, you can display multiple im fields. contacts sets a maximum number for how many times each field type can appear on the screen. once you reach this maximum (for example, the maximum number of im fields is displayed), the field type no longer appears on the pop-up list.
