An indication input system for use in with facsimile machines and similar devices. The input system having a coordinate input device which displays an organizational chart expressing the relationship of a plurality of functions, and registers the coordinates of a point when indicated on the organizational chart, a memory for storing a data table including the plurality of functions, a plurality of key domains which define the coordinate boundary of each function, and related data which defines the relationship between the plurality of functions as expressed on said organizational chart, and a controller which determines which functions have been selected when a point is indicated on the coordinate input means, and sequentially effects the execution of the selected functions and the functions related to the selected functions.
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