RE: Dynamics GP 2016 Item Weight On Sales Transaction Entry Window
Yes, you could use VBA or Visual Studio Tools with Modifier to add this information to the window. The overall idea is to use modifier to add a custom field first. If using VBA, you can then read the data from the IV00101 table at the database level based on the line item selected.
If using Visual Studio Tools, you will need to use the Dictionary Assembly Generator (DAG.EXE) to create an assembly for the forms.dic dictionary form, then create a Visual Studio Tools project and reference the forms assembly. You can then create an event handler to display the item weight from the Item Master table, when an item is selected.