Mission control supposed to show everything running on Mac. The definition for Mission Control given by this website also confirms that (see the screen shot shown bellow. EDIT: This has now been corrected after this question).
But, I cannot see the hidden windows in my Mission Control. What am I missing?
EDIT: Apple support page says Mission Control is the quick way to see everything that's currently open on your Mac. Does this mean hidden windows are closed? What does actually hidden windows mean?