In article , "C & S" wrote:
Here are the few that I use:

X = cutoff or waste side of a line.

I'm afraid of confusing myself any more than I already am. "Hmmm... does X
mark the side to keep, or the side to toss?" So I always write "waste" on the
waste side.

I mark the lines like this |- or -| to show which side of the line the kerf
belongs on.

O = Show face, more importantly used as the reference face. For instance ,
if I am using a tennon jig, I always reference the front of the pannel. If
there happens to be any thickness irregularities, the will show up on the
back of the panel.

Better IMO to mark the face *opposite* the show face, to eliminate any worries
about the markings still being visible in the finished project.

Triangle -drawn across a joint to show the order and orientation of the
components of a glue up pannel.

I number them 1, 2, 3... from left to right, on the ends of the boards.
End-for-end orientation is preserved by numbering them at one end only.
Maintaining proper order and orientation is trivial: if the numbered ends are
all at the same end of the panel, right side up, and in sequence, everything's
right, and if not, the nature and location of the problem is instantly
obvious.

And again, no worries about the markings being visible in the finished
project, because the ends will be trimmed off anyway. If for some reason, I
need to mark the face of a board, I use Post-It Notes.

Right angle (like in geometry class, two lines to form a box in an interior
angle) - used to indicate the adjacent sides of a board which were jointed.
When rejointing previously milled stock, it's not always obvious what faces
were trued.

Absolutely right. I started out marking mine the same way, but found that it's
faster and just as accurate to simply make a diagonal slash at the appropriate
corner on each end of the board.

--
Regards,
Doug Miller (alphageek at milmac dot com)

Nobody ever left footprints in the sands of time by sitting on his butt.
And who wants to leave buttprints in the sands of time?