Deleted elements are marked with a bit for delete, but are not deleted immediately. When a file is accidentally cleaned out, eg with fence void, and the file size remains la large, eg 6 megabytes, then all that date is still in the file. IF a compress is d

Deleted elements are marked with a bit for delete, but are not deleted immediately. When a file is accidentally cleaned out, eg with fence void, and the file size remains la
large, eg 6 megabytes, then all that date is still in the file. IF a compress is done, the file size shrinks, and the data is lost. But if a compress is not done, and the file remains big, then all the deleted data is still in the file, each element with its delete bit set. It is possible to go through and reset those bits, recovering all the date. (if the file has not been compressed. HOW do I do it???