At the top of your email draft in the editor, you'll notice the following menu:

From here, you'll have the option to:

• Exit the screen and go back to your main dashboard by selecting "exit"
• Undo/Redo any changes you want to revert or bring back
• Preview the email in your browser (with option to view in desktop, mobile or tablet mode), send yourself a test, or send a test kit
• Save without sending
• Next to continue creating your campaign