A simple example demonstrating how ShowControls can be used to show control information with just a few lines of code.
This example scene is included in the showControls.unitypackage, at Standard Assets/ShowControls/Examples/Scenes/exampleSceneSimple
You can also view the relevant source here: https://github.com/Beanalby/ShowControls/blob/master/Assets/Standard%20Assets/ShowControls/Examples/Scripts/exampleSimple.cs