Handy Windows Shortcuts during a Powerpoint Slideshow

Powerpoint is the presentation application of the Microsoft Office suite.
We are using the latest Office 365 version of Powerpoint, but these shortcuts will work in pretty much all versions.
A Powerpoint presentation is usually viewed as a slideshow, which guides us on a specific path through the information presented.
During a Powerpoint Slideshow, you may need to access another application, open another file or change the presentation mode. You can do all this without closing your slideshow!
To access the Taskbar, press Windows key + T.
To access your presentation settings, press Windows key + P.
To access your files, press Windows key + E.
Just switch back to the presentation by pressing Alt + Tab.