使用工具"->命令"托盘菜单以操场模式打开笔记本.

Open the notebook in playground mode using Tools -> Command pallet menu.

游乐场模式禁用保存.为了手动保存，您需要使用菜单文件->在云端硬盘中保存副本来创建笔记本的副本.

Playground mode disables saves. In order to save manually, you'll need to create a copy of the notebook using the menu File -> Save a copy in Drive.