Determining the "Present" in an I Ching Casting

An excerpt from The Magician's I Ching:

In I Ching tradition, the number of changing lines you have affects what should be read.  Depending on the number of changing lines, the "present" or "central incipiency" of a casting varies.  Everything that comes before that "present" is a reflection of previous developments (that are still influencing the present moment), and everything that comes after are "incipiencies" that have not yet manifested, that is, later developments.

Determine the changing lines you have:

-No Changing Lines:  the Main Hexagram Text is central, and should be the only part read.

-1 Changing Line: the single changing line is the "present".  The Main text and the main text of the resulting hexagram are broad themes of the prior and later developments.

-2 Changing Lines: the UPPER of the two changing lines is the "present".

-3 Changing Lines: the MIDDLE changing line is the "present".

-4 Changing Lines: in this case you should read the main text of the hexagram, the four changing lines of that hexagram AND the two unchanging lines of the resulting hexagram (so if you have a hexagram with lines 1-4 being 'changing lines'; you should read those four, plus lines 5 and 6 of the new hexagram).  Of these, the LOWER of the two resulting hexagram lines is the "present".

-5 Changing Lines: As above, read the main text, all 5 changing lines, and the single line of the resulting hexagram that was not changed.  The single unchanging line from the resulting hexagram is the "present".

-6 Changing lines: read the main text, all six moving lines, and the resulting text.  The resulting hexagram text is the "present".