I'm new to Spine. I need to clarify doubts but in my country there is no one who can help me.

So here we go:

1) Is there a way to tag keyframe on all parts at the same time?

Sometimes I want to do a standing pose, but I have to click on the head, mark, click on the arm, mark, and this is quite annoying ...

2) How can I exchange character expressions?

In my project there are 3 heads with 3 different expressions and I wanted to change them in the middle of an animation. But I can't do that.

3) Is there a way to draw on the spine?

I would like to plan some animations by making drawings over the top.

If you have any videos that help in these doubts I will be very grateful!