"n" icon at top left hand of screen

Hi! I’m new to Glyphs and was easily able to make a font and now need to work out the spacing. I love all the videos but they show a small icon in the top left hand corner that looks like a double “nn” (two buttons?)
(I’m a new user and it will not let me post two pics…sorry!)

Here is the video reference:

Unfortunately, I only see this:

How do I get those two buttons? I’m not seeing anything in the View Menu that brings those icons up for me.

Thanks in advance! I’m sure it is an easy fix!

Those icon buttons appear when you create multiple masters. Check out the tutorials on Multiple Masters and the Multiple Masters section of the Glyphs Handbook: https://glyphsapp.com/get-started