Mac OS X 10.4 or later: Unable to define custom envelope or label sizes in Address Book

Issue or symptom

The first time you try to define a custom label size or a custom envelope size, you may be unable to edit the numbers displayed in the measurement fields (height, width, margins, and so forth).

Solution

As a workaround, follow these steps:

1. Open Address Book.
2. Select a card which includes a mailing address.
3. From the File menu, choose Print....
4. In the Print Dialog window, choose Define Custom from the Layout pop-up menu.
5. Enter a Layout Name and click OK.
6. You should now be able to edit the numbers in the measurement fields.

If you still cannot edit, leave the Print dialog open and switch to another application, then switch back to the Address Book Print dialog. You should now be able to edit the numbers in each of the measurement fields.

This document will be updated as more information becomes available.