Sessions & Tracks : Pro Tools Main Windows : Window Configuration Commands and Options : View Filter Icons

View Filter Icons
Using the View Filter icons, the Window Configuration List lets you show or hide Window Configurations based on whether or not they are stored with Window Layout, Edit Window settings, Mix Window settings, Score Editor window settings, MIDI Editor Window settings, or Transport Window settings.
To show or hide Window Configurations in the Window Configuration List, do one of the following:
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Click the View Filter icon to show or hide Window Configurations that include that property (Window Layout, Edit Window Settings, Mix Window Settings, Score Editor Window Settings, MIDI Editor Window Settings, or Transport Window Settings).
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Select or deselect the View Filter item in the Window Configuration List pop-up menu.