The Grease Pencil frame is removed from the
Time Slider and the image no longer displays as you playback the scene.
Note: If you have already saved the scene, the Grease Pencil image files are still saved in the default project directory on disk. (See also
Save and share Grease Pencil sketches.)
To delete a Grease Pencil image from disk
Navigate to the default project directory of your current project.