Set the playback volume for images. This setting can be made separately for each individual image.
Select "Set playback volume" and choose from the volume settings listed below.
Pressup/down to select the item you want to set, and press left/right to adjust the volume.button to apply the volume setting. Press the "Playback volume check" button to toggle play/pause and check the volume. After the playback volume is set, the screen returns to the Edit menu. (More details)