Thank you for your reply!

I know that method but I was referring to the situations where you're playing a track and add it directly to a playlist or mark it as favorite from the now playing screen, because every time I want to add a track to my favorites playlist I have to load the playlist, go to the track from the menu, add it, go to now playing and save the playlist again.

I was just wondering about this issue on the playlist because it's a bit painful to do all that, so I decided to bring up the question... I suppose most of the people don't manage the music this way but sometimes is the only way for me to find a track twice, otherwise it gets lost until it randomly comes up again lol.