Where should One stand when there is no Place in the Saff?

Q: Salaah-96: When there is no place left in a Saff (row of people in salaah), should one stand in the centre or at the corner?

Answer: If there is no place in the Saff, wait until the Imaam goes into Ruku If someone else arrives by then, stand with him at the back directly behind the Imaam and if no one arrives, stand alone at the same place. And Allaah knows best what is most correct.

Fatawa Rahimiyyah vol.2