The favorites thing is something from Gnome Shell i believe which is not present in Trenta, to pin something to Plank simply open it and it'll show up in plank, then while the app is open right click it's plank icon and click "Keep in Dock"
The favorites thing is something from Gnome Shell i believe which is not present in Trenta, to pin something to Plank simply open it and it'll show up in plank, then while the app is open right click it's plank icon and click "Keep in Dock"