I just installed Budgie, and here’s how to pin an app to the default panel. In this example, gedit
First, gedit must be active and on the Desktop. This puts an icon on the panel.
Next, right click on this icon. You will get the following dialog.
Put your cursor on the star and a “Favorite” label appears. Click on the star. The only thing that changes is the thickness of the star’s border. The gedit icon will be pinned on the panel.
To remove it, right click on the gedit icon, the click on the star and it will be unpinned.
Pudge