Include Video: When enabled, the preview plays video.
Include Audio: When enabled, the preview plays audio.
Include Overlays and Layer Controls: When enabled, the preview shows overlays (for example, grids and guides) and layer controls for selected layers as defined in the View > View Options dialog box. Note that this can be enabled regardless of whether Include Video is enabled.
Viewer panel overlays include guide lines, safe margins, grids, and 3D reference axes. To choose which overlays to show for the current viewer, open the Choose Grid and Guide Options menu at the bottom of the viewer panel.
While a preview is playing back, you can dynamically show or hide layer controls using: Cmd + Shift + H (Mac OS) or Control + Shift + H (Windows).
Loop: Specify if you want the Preview to play in a loop.
Note: Showing or hiding layer controls during a preview does not affect the state of the Layer controls option in the Preview panel.
Note: You cannot simultaneously disable all the three Include buttons. At least one button must remain enabled. When you disable the third button, one of the other buttons is enabled.