Why can't I see the complete Pose Tools UI in ZB?

Why do some subtools refuse to update when I send a CC pose to ZBrush Pose Tools?

What do I do if the ZBrush character does not update after sending partial- or full-body poses (by using Send Current / T- / A- Pose)?

How can I update a pose that was already sent from CC to a ZBrush character?

Why does the character revert to its original subdivision level after I subdivided it and activated another pose?

Will there be any issues if I use GoZ > Relink in Character Creator after using ZBrush Pose Link > Send Current Pose?

How do I send a newly created accessory from Character Creator to ZBrush?