In Jain temples, Bhagwan Adinath (Rishabhdev) is generally installed facing the East.

• There is no strict scriptural rule that Adinath’s murti must face only one particular direction.
• In most Jain temples (both Shwetambar and Digambar), the Moolnayak idol of any Tirthankar, including Adinath, is usually made to face East, because East is linked with sunrise, light and enlightenment.
• In some famous temples (like chaumukhi temples), Bhagwan Adinath has four faces, so the idol faces all four directions (East, West, North, South) at the same time.

If you were asking about posture instead of direction:

• Adinath is commonly shown sitting in padmāsan (lotus posture) or standing in kāyotsarg (meditation standing posture).