A transmission apparatus includes: selection means for selecting transmission data to be transmitted to a destination apparatus; setting means for setting a transmission target period during which the selected transmission data is transmitted; control means for resizing the transmission data in such a way that the size thereof becomes smaller than or equal to a total transfer data size of the transmission data, the total transfer data size determined based on the transmission target period; display control means for controlling display of transmission information on the transmission data resized by the control means on a screen; and transmission means for transmitting the transmission data resized by the control means to the destination apparatus.