Examples: IsHeaderFontBold property (NotesViewColumn - LotusScript®)
This agent toggles the bold font style.
Sub Initialize
Dim session As New NotesSession
Dim db As NotesDatabase
Dim view As NotesView
Dim vc As NotesViewColumn
Set db = session.CurrentDatabase
Set view = db.GetView("Categorized")
Set vc = view.Columns(0)
vc.IsHeaderFontBold = NOT vc.IsHeaderFontBold
End Sub