How can you see the inbox while composing a message in Full Screen Mode on Mac?

In Full Screen Mode on a Mac, when composing a message, clicking anywhere in the viewer outside of the message allows you to exit the composition window temporarily. This action reveals the inbox alongside other elements of the application, enabling you to view your incoming messages while still retaining the ability to compose your current email.

The other options involve methods that might not provide the same seamless transition out of the message composition interface. For example, showing or hiding elements individually might not give the same accessible overview of the inbox. Similarly, using keyboard shortcuts or attempting to modify the window directly could be less intuitive and might not provide instant access to the inbox as clicking outside the message would. Thus, clicking in the viewer outside of the message is the most effective way to manage multitasking in this scenario.