code: def unit_down(self, event):
      self.canvas.yview_scroll(1, "unit")
      return "break"
  
imports: import os
  from tkinter import *
  from tkinter.ttk import Frame, Scrollbar
  from idlelib.config import idleConf
  from idlelib import zoomheight
label_desc: Use image node_id 5 for calling the ScrolledCanvas obj's underlying member method code with example usage: obj.unit_down(event) and returns: str