Reply To: Siddurim – why are they printed like this?

It’s also easier for those of us who don’t know where all the psukim are sourced from to differentiate between which paragraphs are related and which are not. For example, “Aleinu” and “Al ken nekaveh” are two different tfillas written by two different people and they are often written in different sizes. This also holds true for the Psukei d’zimrah.