To update an existing contact list with new columns for custom variables, follow these instructions:
- Log in to your account
- Select Address Book from the Libraries drop-down in the upper menu
- Click Settings for the list you want to edit
- If the list doesn’t already have any custom variables, click the Custom Columns tickbox
- Enter the names of the columns you want to add into the boxes (if more boxes are needed, these will automatically be added when the first three boxes have been filled)
- Click Save