Please refer to the Module 3 - Principle 3 Handout you have downloaded. It further addresses vertical movement on the mat and introduces the Third Principle of Rotation.
Please refer to the Module 3 - Principle 2 handout you have downloaded. It explains the 2nd Principle of Rotation and the various ways that principle can be applied.
To experience and gain a feel for this new understanding, practice it in Vinyasa Flow Class 21. (Note: the written version of this class is included in the Module 3: Adding Twists to the Mandala - Written Classes download)
To understand 2 Full Halves used in open hip sequences from both down dog and forward fold, and to understand how to use this principle to address complementary postures, view the following 2 videos.