There are classes you can take on SageU that can walk you through the basics of creating UDFs and adding them to panels - like Item Maintenance. This is also something your Sage Business Partner can easily do for you. I am of a mindset, as I think many are, where I am happy either creating UDFs or teaching our clients how to create them.

There are also 4 built-in "UDFs" in Inventory Maintenance. They are called Categories (1-4) and you could call one of them "Brands", if you like.

For consistency, however, probably a UDF with a pull down list would be best - depending on how many brands you have.

We added a UDF for Brand in Product Line Maintenance