An information processing apparatus has an additional information adding unit, a display, an acquisition unit, a status determination unit, and a display control unit. The additional information adding unit adds additional information to an electronic document. The display displays the electronic document and the additional information added to the electronic document. The acquisition unit acquires, in a state where the electronic document is being displayed by the display unit, additional information added to the electronic document by another information processing apparatus. The status determination unit determines whether or not a user is unhindered in referencing the additional information added by the other information processing apparatus. The display control unit controls the display to display the additional information acquired by the acquisition unit when it has been determined by the status determination unit that the user is unhindered in the referencing.