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. Viewer panel overlays include guide lines, safe margins, grids, and 3D reference axes. This can be enabled regardless of whether Include Video is enabled. 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. Include Audio: When enabled, the preview plays audio. Include Video: When enabled, the preview plays video.
