Panasonic VDR-D300 Operating Manual (English, Spanish) Operating Instructions Manual page 82

Editing scenes
To complete editing
Press the MENU button.
≥ To delete an unwanted part of a scene, divide the
scene first, and then delete the unnecessary part.
(l 83)
≥ In case of [ALL], the deletion may take time if there
are many scenes on the disc.
≥ Do not turn off this unit while deleting.
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≥ When you delete scenes, use a battery with
sufficient battery power or use the AC adaptor.
≥ It may not be possible to delete scenes that have
been divided. Combine the divided scenes, and
then delete them.