Function executing method of device, device, and program

A function executing method of a device that executes

• a step of displaying an operation unit image, which is an image of an operation unit of an apparatus including the operation unit and an apparatus function executing unit that executes a function by an operation of the operation unit, by a device display unit,
• a step of detecting an operation of the operation unit image by a detection unit, and
• a step of executing the function based on detection of the operation of the operation unit image by a device function executing unit,
• wherein the operation unit has a letter input unit that receives an operation of inputting a letter,
• the apparatus function executing unit creates print data, as the function, based on the letter input by an operation of the letter input unit,
• the apparatus further includes a printing unit that performs printing based on the print data,
• in the step of displaying the operation unit image, a letter input unit image, which is an image of the letter input unit and receives the operation of inputting a letter, is included in the operation unit image displayed by the device display unit, and
• in the step of executing the function, the device function executing unit creates the print data, as the function, based on the letter input by an operation of the letter input unit image.