Engineering tool providing human interface among plurality of human interfaces according to user skill level

An engineering tool comprising:

• a basic processing unit that performs a process of program editing according to an input operation by an input device;
• and
• a display processing unit that displays an operation screen for the program editing on a display device, wherein
• the basic processing unit can accept the input operation by a plurality of input devices respectively corresponding to human interfaces for each of a beginner level, an intermediate level and an advanced level,
• the engineering tool sets a main component for each of the human interfaces, the main component being one of the input devices, and
• when any one of the human interfaces for the beginner level, the intermediate level, and the advanced level is selected according to a level of operation skill in the input operation, the basic processing unit performs a process in accordance with the input operation by an input device corresponding to the selected human interface, and the display processing unit displays the operation screen corresponding to the selected human interface on the display device, and wherein
• a particular human interface among the human interfaces is selected for each function of the program editing, and
• the basic processing unit stores the particular human interface selected for each function of the program editing in response to the function of the program editing being interrupted and holds the particular human interface selected for each function of the program editing in association with the function of the program editing.