Vol/Pan: in the owner's manual

Vol/Pan: in which products?

The Volume block offers various audio tapers. Cliff: "The number is the percentage at the halfway point. I.e. Log 20A means that the resistance is 20% at the halfway point in the travel. So if you put the knob at noon, the volume would be 20% of maximum (about -14 dB)." source
To simulate a Log taper in a modifier menu, set "Mid" in the modifier menu to 20%. Adjust Slope to avoid the dead zone.

To automate volume swells (like a Boss Slow Gear pedal), use a Volume block at the start of the grid and attach Envelope to its Volume parameter. You can also copy the block and Envelope settings from a factory preset, such as Auto Swell Pongverb, Ganymede or Atmosphere. The Envelope's Attack parameter and the Volume block's Taper parameter determine the swell rate.
Alternatively, for example to achieve Van Halen's Cathedral effect, set the input noise gate to a low threshold (i.e. -49), set ratio between 3.3 and 4, Attack and Release to 31 ms.

Tie the Volume parameter in a Volume block to Envelope. As long as you don't hit the strings, the input signal is off.

The fact that the Volume block doesn't require much CPU makes it a good solution for routing scenarios. By setting its Bypass parameter to mute and placing it at the start of a certain routing, you can enable or disable a certain routing within a preset, depending on the state of the Volume block. You can set it per scene.