As EugeneL mentioned - https://developer.apple.com/forums/thread/669955?answerId=664128022#664128022, my solution was to open a file in a new window. However, someone else discovered that opening a new tab works even better. There's an assortment of other solutions here. Xcode 12 - Project Navigator width is stuck/locked, can't resize - https://stackoverflow.com/questions/65851619/xcode-12-project-navigator-width-is-stuck-locked-cant-resize

Try this: In the playground on your iPad, tap the ... at the top-right Tap Advanced Tap Export New Playground Tap Share Exported Playground AirDrop it over to your Mac, then right-click and select Show Package Contents Go into Contents - PrivateResources Delete everything that you want to delete The playground should be much smaller now AirDrop it back to your iPad Run the new playground

Btw, PlaygroundKeyValueStore.current.keyValueStore["myKey"] didn't work for me. Instead, try PlaygroundKeyValueStore.current["myKey"]

Go to this URL (you'll be asked to sign in if you haven't yet): https://developer.apple.com/wwdc21/swift-student-challenge/apply/