I don't have a Yamaha receiver nor have ever used presence speakers but I'll give my opinion for what it's worth.
The intent of presence speakers is to widen the soundstage so they should be placed outside the mains, but whether they should be toed-in, aimed straight at the listening position, or even toed-out is going to be personal preference and dependent on the room.
If they are placed very wide outside of the mains, then toeing-in slightly might be appropriate. If they are placed just slightly outside the mains it may be best to aim them straight ahead or even toe them out slightly so they point at the nearest reflecting surface, like the side walls.