I'm trying to create a custom dialog button in custom office on the SO Entry Detail screen to show some UDFs. The button would need launch a screen that allows me to put some UDFs that are linked to the line. If I create a custom dialog button in that screen it only allows me to pull from the SO_SalesOrderHeader fields. 

I could add them to the grid but I don't really want to show them in the grid as they are not always needed and only optional. 

Does anyone have any ideas?