What're the merits & demerits of using the ?Character Set ?Do we've to create all the keys while being inside a Char. set or do we've to also do so in the None mode?I am a bit confused!When to switch between char. set & None?

And this is about Blocking a scene.After Blocking while creating the breakdowns can I Mute certain controls while working on the others.And while creating breakdowns the controls start moving because "control poses" have already been created. I've observed that a lot of time is wasted in repositioning the controls to create a key.Is it possible to mute the keys,for a control,ahead of the current frame so that the control doesn't move