For example, if l bought the PHB and ZgtE, could l disable the ZgtE content, like i can with homebrew or Critroll content, to only have the PHB content??
No, because XGtE is core content. The filters you see now are the only filters there are. Individual books can be excluded from campaign sharing, and on pages like the spell page or magic items page you can filter by book, but in that case you can only add, not exclude.
For example, if l bought the PHB and ZgtE, could l disable the ZgtE content, like i can with homebrew or Critroll content, to only have the PHB content??
No, because XGtE is core content. The filters you see now are the only filters there are. Individual books can be excluded from campaign sharing, and on pages like the spell page or magic items page you can filter by book, but in that case you can only add, not exclude.
Birgit | Shifter | Sorcerer | Dragonlords
Shayone | Hobgoblin | Sorcerer | Netherdeep
That sucks.