As a new ArcGIS Pro user, I would benefit from a button in the Primary Symbology window that brings me to the Gallery/Properties window.
Go from here:
After some frustration, I figured out that it can be achieved by clicking the symbol in the Table of Contents left pane:
But that was unintuitive to me. I don't understand why I couldn't navigate directly from the Primary Symbology window to the Gallery/Properties window -- via a button right in the Primary Symbology window.
Could the UI be improved to make it more intuitive for new users?