This content was released on Feb 11 2020. The official support period is 6-months from this date.
Install the menu into the app and add custom actions to it. You'll be able to delete cells and also use your shapes grid to choose the shape of each cell.
This is a companion discussion topic for the original entry at https://www.kodeco.com/6485147-drawing-in-ios-with-swiftui/lessons/16