About Android Object spy

I am staring learn about mobile testing, so i tired to use object spy with demo.
I want to navigate to sub menu in demo to capture object but I could not navigate to sub menu. just display the top of menu.
Please give me some suggestion for navigating sub menu to capture object.
For example

  1. tap “Text” on the menu
  2. It should navigate to sub and display “Linkify”,“LogTextBox” and “Marquee”