A non-transitory storage medium stores instructions executable by a communication terminal including a display and an input device for detecting an instructed point on the display. The instructions cause the communication terminal to: receive, from a processing apparatus, instruction image data for displaying an instruction image for instructing the processing apparatus to execute a processing; display the instruction image; and transmit, to the processing apparatus, an input event on the input device and coordinate information about the instructed point detected with the instruction image being displayed. The coordinate information is based on: standard-size positional information for indentifying a location of the instructed point when the instruction image is of a standard size; and a location of the instructed point on the display regardless of whether a size of an instruction image being displayed on the display is increased or reduced.