Since you have not yet responded, and I need to move forward, this is what I have decided.
The author definitely wants to mark all of the half steps in these exercises. So I have used wordsign h to indicate a half step. I put this in a tn the first time it was used, and also on the appropriate p-pages.
When the - for the shift is used, I used wordsign s. However, I ignored these hyphens in the beginning part of the book, where shifting is first introduced, since it was not mentioned. What do you think?