Can I use the pedal, witch to subordinate only FXA?
Sorry, don't understand. Must be the season of the witch.
Where I can select to use in a Preset? Pedal 1 or Pedal 2?
Assuming you mean "how do I use these in a preset", look at the User manual See p.45 on setting up "External Controllers", then p.40 on modulating parameters.
The manual is a little unclear on this complex topic, but p.40-46 is the right area.