6.1 Singleton in Dummy

6.2 High for Higher

6.3 Middle = Continue

6.4 Middle = No Preference

6.5 Still Suit Preference?

6.6 Suit Preference Later in the Hand

6.7 Don't Help Declarer

6.8 Suit Preference vs. NT

6.9 An Obvious Non-Shift Suit

6.10 No Better Idea