Here are simple, respectful guidelines for what to say and do inside a derasar (Jain temple):

• Greet respectfully: Say “Jain Jinendra” or “Jainnama” when you enter and when you meet others inside.
• Acknowledge the Tirthankaras: In most derasars people bow or do a Namaskar to the idols/Mulnayak with folded hands as a sign of reverence.
• Recite core prayers (common to both Digambar and Śvetāmbar traditions):

- Navkar Mantra (Namokar Mantra) is widely heard in derasars: - “Namo Arihantānaṁ Namo Siddhānaṁ, Namo Ayariyānaṁ Namo Uvajjhāyaānaṁ, Namo Loe Savva-Sahaḷānaṁ.” - A shorter, commonly chanted form is: “Namo Arihantanam Namo Siddhanam...” - If you know it by heart, recite it softly; if not, simply standing in quiet reverence is fine.

• Sit with calm conduct: Speak softly, avoid loud conversations, and move gently if you walk around the sanctum.
• Practice ethical considerations in daily behavior:

- Do not wear leather into inner sanctums if possible (some derasars observe this as a precaution out of non-harm). - Do not touch or climb on idols or platforms; observe with reverence. - Do not take photographs or videos in the sanctum unless allowed. - Refrain from eating or drinking inside the sanctum area; outside areas may have offerings or prasad.

• If you participate in a formal ritual (puja, aarti, or pradakshina):

- Follow the guidance of the senior or the temple staff. - Use a calm voice and keep movements slow during circumambulation (pradakshina) or offerings.

• After your visit:

- Offer a short bow or Namaskar to the Tirthankaras again as you leave. - If there is a communal meal or prasad, accept and partake with modesty and gratitude, if you choose to.

Important notes about differences:

• Navkar Mantra and the general practice of bowing to the Mulnayak are central and common to both Digambar and Śvetāmbar traditions.
• Some temples have specific local customs or dress guidelines; if you are unsure, ask temple volunteers or observe what others do.

If you’d like, I can point you to a specific JainKnowledge page that covers derasar etiquette or prayers (just say “yes” and I’ll check for a relevant page).