Hi,

In order to add button to existing Acumatica screen, you need following:

1. Understand what is main graph. In order to find out, just press on your keyboard Ctrl + Alt + click anywhere on the form. You'll see following picture:

2. Then in C# code, you may write something like this:

public class SOOrderEntryExt : PXGraphExtension<SOOrderEntry>
{
    public static bool IsActive() => true;
 
    public PXAction<SOOrder> TestSomeStaff;
    [PXButton]
    [PXUIField(DisplayName = "Test some staff")]
    protected virtual IEnumerable testSomeStaff(PXAdapter adapter)
    {
        // Some of your logic
 
 
        return adapter.Get();
    }
}

 And here you go, yo'ull have button ready for you. Just don't forget to add your logic