One who reads the Megilla may position himself as he wishes, either standing or sitting. Whether one person reads the Megilla or two people read it together, they have fulfilled their obligation.

It was taught: This is not the case with regard to reading the Torah, which may be read only by a single person. The Sages taught (Tosefta, Megilla 3:20): When reading from the Torah, one person reads and one may translate the reading into Aramaic for the congregation, provided that there are not one person reading and two people translating, because two voices cannot be heard simultaneously. And when reading from the Prophets, one person reads and two may translate, as there is less of a need to ensure that everyone hears the precise translation, as the Prophets do not teach halakha. This is the case provided that there are not two people reading and two translating. And when reciting hallel and reading the Megilla, even ten people may read and ten may translate.

It was stated: Two should not read in the Torah and one translate. Rebbi Ze`ira said, because of the benediction. But was it not stated, not two shall translate and one read. Could you say, because of the benediction? But because [not] two voices enter one ear.

The Gemara asks: What is the reason that the Megilla may be read by several people at once? Since the Megilla is cherished by the congregation, they will pay close attention and hear it, and they will not become distracted by the different voices.