You are very wrong on that. The Presonus forum is by far the best place for help with Studio One. There are far more experts and experienced users there than here that is for sure.
Did you post and expect an answer in 5 minutes perhaps? I for one am there a lot of the time
(as a moderator as well) and did not even see your post. I would have responded.
But the main thing is that you got an answer. Yes you can transpose multiple tracks at once. You need to have events on them. Select them all. Open the Inspector. The window to set them is all is the very bottom window as indicated by
Rasure. Not the upper window.
When you in fact select multiple events
(audio as well) the bottom area of the inspector is the place to effect all of them e.g. If you want to rename multiple clips at once the bottom window is the place to do it.
I agree the manual is not super great for sure. I believe a new one is coming soon. But the manual still leaves out many functions. It is mainly a basic guide.