There are provided an image processing apparatus, an image generating apparatus, and an image processing method, capable of automating assignment of keys to functions and registration of macros provided by the image generating apparatus and presenting an index such as a shortcut key associated with one of the registered functions to a user at the timing when the user uses that function. To achieve this, first an operation command issued by a user through a control panel 1000 is received and history information about the operation command is stored in a storage device 900. A controller unit 200 detects history information about an operation command received through the control panel 1000 from among the history information, creates and registers a shortcut key for performing a operation command received through the control panel 1000 on the basis of the result of the detection, and presents the shortcut key to the user at a predetermined timing.