How can I rename Billing Zip Code to Billing Zip/Postal Code

About half of my customers are from Canada and the other half the US. How can I rename the Billing Zip Code to Billing Zip/Postal Code?

Thanks!
Robin

If you go to Admin > Settings > Application then on the list infront of you find contact, you can rename fields there.

This is JUST a visual change, the name the field is know by in the database doesn’t change so the merge would still look like it did originally.

All the best

Andy