Is it valid for the imam to use phrases like "put your heel against the heel" and others instead of the transmitted phrases?

Question:
He says: Honorable Shaykh, may Allah grant you success, is it permissible for the imam to say after the iqamah, "put your heel against the heel" or "shoulder by shoulder"?

Answer:
He says: What is reported in the hadith is "stand in straight rows," "fill in the gaps," and "come close together." These are the phrases reported in the hadith. Is it not obligatory to use what was reported? Yes.