How can I edit a showcase?

You can edit a showcase by swiping it in the list from left to right and then using the Edit button. Alternatively, you can long-press a showcase (Or right-click on macOS) and then select the Edit option from the menu. You can also edit a showcase on the screen for previewing it by using the Settings button in the top right corner of the screen and then selecting the Edit option from the menu on iOS. On iPadOS and macOS, you can use the Edit button (Pencil icon) in the top right corner of the screen.