(1) [[Well log]] track on the [[API log grid]]. Holding the well log vertically so that the top of the well appears at the top of the log,

Track 1	=	Log track on the left side of the log. Left of the depth column.
Track 2	=	Log track to the immediate right of the depth column and in the middle of the log.
Track 3	=	Log track on the far right side of the log.

See [[scale]] for illustration. (2) Follow parallel or nearly parallel.