In order to add custom fields to either Customer, Stock or Nominal:
In Dimensions, on the System tab, click Options and select Custom Fields. A new window will appear.
Select the required tab, ether Customer, Stock or Nominal.
Select the fields which are required to be added.
Click Save to confirm the changes.
When you go back into the Stock Record, you can use the Scroll button within the Ribbon which will enable you to view the Custom tab where the Custom field will show.
Note: This functionality is not available in Dimensions Lite.