December 7, 2005 on R3X Course
The six direction process was formerly called the "Over/Under" process and the "Above/Below" process. It is the same process, but the names have changed. With Robert's approval, I have changed the name of this process retroactively throughout all the articles that make up this checksheet. Only the name has been changed, not the procedure. The current name is the most descriptive and least confusing one.
Sometimes the full "six direction process" will be used; sometimes it will be abbreviated to "6-dir".