thermostat fan question

[dhysom]

Is there a way to turn the thermostat fan on/off independent of heating? The only choices appear to be AUTO, CYCLE, ON.

ON appears straight forward. AUTO I assume means something like, "let the furnace decide" or "turn on when heating, possibly after a delay." CYCLE I'm guessing is "run for X minutes hourly.

I haven't discovered (is it possible?) to turn the fan on/off independently of heating or cooling.

Thank you very much for your work on this project; it's great!