LitCharts assigns a color and icon to each theme in Harry Potter and the Cursed Child, which you can use to track the themes throughout the work.
Parenthood
Time, Mistakes, and the Past
Friendship, Family, Love, and Bravery
Reputation and Expectation
Death and Sacrifice
Summary
Analysis
Scorpius pores over history books in the library, figuring out that Cedric survived and became a Death Eater, but Scorpius isn’t sure how. Seeing Scorpius, another student in the library named Craig assures him that he’s almost finished with Scorpius’s Potions homework, but he has a lot to do because Snape gave so much of it. Hearing this, Scorpius gets an idea.
Scorpius begins to discover just how his and Albus’s actions affected the timeline, as Cedric survived as they hoped but then became a Death Eater, showing how even simple attempts to change the past can have a huge effect on the future, which is why it’s better not to fixate on the past or worry about changing it.