Hi all! 
I am making a media playing app. There are 4 categories of music the user can select on Screen1.
When the user chooses one, this navigates to the Media screen. The music instantly begins to play, called in a shuffled order from a column of links in a local spreadsheet.
The goal: I need to tell the app to play music only from the category they selected when they arrive on the Media screen.
I’m unsure how to achieve this on 1 screen successfully. I could make 4 separate Media screens, but I was told that is not wise. I was also told not to have a navigation button do any other functions, so I’m really unsure how to achieve this!
Q: How does the app know which button was clicked on the previous screen? 
