Diagrams are saved in your profile. You can play around with the editor and download images, but you won't be able to save your work without logging in.
YOU ARE OFFLINE! Please restore your internet connection to save your work!
You can't save your work in your profile if you are offline but your document has just been saved in your browser's memory.
If you can't restore your connection and you must leave the editor without saving we will attempt to restore your document from your browser's memory when you come back.
If you keep working, all new changes will also be stored in your browser's memory.