Custom Fields position in VM 3.0.6.2

[johnknit]

Where can I change the layout positions of the custom fields on the product details page?

Jppmla 3.4.0  VM 3.0.6.2

[jenkinhill]

Template overrides. Files involved are:
components/com_virtuemart/views/productdetails/tmpl/default.php
components/com_virtuemart/views/productdetails/tmpl/default_customfields.php

and depending on what you want to do, possibly also
components/com_virtuemart/sublayouts/customfields.php