I wondered about that. Any tips? i.e. what will moving it forward or back likely do to the leg extension or my posture? I like being a little more upright, and I was surprised that the seat being higher didn’t force me to pitch forward more. I don’t have my head around seat-to-bar ergonomics yet.
The previous posts have good tips. Also, bike fitting for an MTB is different from that of someone riding the road. I stand far more on an MTB on the the trail than someone does on the road. I can say for both that moving the seat forward put you in a more upright position and vice versa. While I can feel the difference in pedal stroke when my seat position moves - usually feels like I'm either more behind the pedals or more on top - the reach to the handlebars is more noticeable - whether I"m more stretched out or more upright.