Choose the print you want to lock by single click/tap: you only want to highlight the dish, not open it. The bottom bar will turn green, like this:
Click anywhere on the green bar, and this screen will pop up:
Here you can edit the dish name, add tags to use in search, and add notes. Notes are not used in search results. All search terms that you want associated with the dish should be in tags or the dish name. You do not need to use hashtags (#) in tags, although you can. You can list tags on separate lines, and/or separated by commas, and/or by simply adding a space between words.
Tap the lock slider to lock (green) or unlock (grey) the dish: