Nitty-Gritty

[Andy]

Originally Posted by CecilOne

Hand up to hold pitch, is it an actual time out?

If so, why one hand and no verbal?
If so, may a runner leave a base?

If not, what rule prevents the pitcher from pitching, other than a no-pitch for everyone not being set?

To add to this question: Are we still counting the time we have the hand up to the pitcher against the ten seconds that batter has to get in the box and set? Are we counting this time against the twenty seconds the pitcher has to pitch once they receive the ball back?