Players indicate their desired play speed to the GM by moving a marker along this dial.

The play speed does not need to be "tracked" on the dial. Groups should feel free to change speed & detail while ignoring the dial. The dial's purpose is to (a) remind the players that speed is up to them, and (b) give them a tool for making "speed up" or "slow down" requests.

More thorough version to also request detail or breaks:

Earlier version:

Didn't work out in actual play -- a circle in the center of the table facing everyone simultaneously is better, as is fewer options -- but helps illustrate the concept and possibilities.