On the third day. The third day from that on which Esther and Mordecai had communicated together through Hatach (Esther 4:5-17). Esther put on her royal apparel. This is certainly the meaning, though the elliptical phrase used is uncommon.
Esther, while she fasted, had worn some garb of woe; now she laid it aside, and appeared once more in all the splendour of her royal robes. She took up her position directly in front of the king's apartment, with the object of attracting his attention, and perhaps with the knowledge that he was upon his throne, whence he could not fail to see her.
The king sat upon his royal throne, over against the gate. In a Persian pillared hall the place for the throne would be at the further end, midway between the side walls. The throne would be elevated on steps, and would command a view down the midmost avenue of columns to the main entrance, which would commonly occupy that position.