To add an instrument to Favorites, open your instrument list in the Markets panel and find the symbol you want (you can scroll or use the search bar).
Then right-click the instrument and select “Add to favorites”. After that, you can view your Favorites by clicking the star icon in the upper-right of the Markets panel, which shows your watchlist.
Favorites also appear first when you open the instrument picker from the order panel, and you can pull up the instrument list quickly with Command+K (Mac) or Control+K (Windows).
To reorder your Favorites, first open the Favorites list (star icon in the upper-right). Then right-click anywhere inside the Favorites list and select “Reorder favourites”. You can then drag and drop instruments into your preferred order, and click “Done” to save.