The Clustered Exposé
macOS utilizes Mission Control as its primary window management system. When you activate Mission Control (either by swiping up with three fingers on your trackpad or pressing the F3 key), the system pulls back to show you every open window on your desktop. By default, macOS attempts to organize this view by automatically grouping windows belonging to the same application together. For example, if you have three separate Safari windows and two Word documents open, Mission Control will stack the Safari windows into one cluster and the Word documents into another. While intended to reduce clutter, this grouping makes it incredibly difficult to see the specific contents of a single window hidden behind the stack.
Scattering the Windows
To easily identify every single open document at a glance and stop macOS from automatically grouping windows by application in Mission Control, you must disable the grouping preference.
Click the Apple logo in the top-left corner of the menu bar and select System Settings (or System Preferences on older versions of macOS). In the left-hand navigation sidebar, scroll down and click on Desktop & Dock. Scroll down the right-hand panel until you reach the section specifically labelled Mission Control. Within this section, locate the toggle switch (or checkbox) next to the setting titled Group windows by application. Click this toggle so that it turns Off (or uncheck the box). The next time you invoke Mission Control, every single open window, regardless of which application it belongs to, will be spread out individually across your screen, allowing you to clearly see the contents of each one.