It would be better if it was but it is far more complex to create a custom field that matches your name. I recommend you just hijack one of the others that are built-in and not being used for their labelled purpose.

If you have a number of fields and want them all in one place then it might be worth going the extra mile but you should make use of the built-in capability first as a test and decide whether you like the functionality enough to bother with the more complex nuances.

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Andrew Lockton
Chrysalis Design, Melbourne Australia