In many presentations and documents we tend to present huge amounts of data. One might not have time and energy to go through the entire data every time. Then you are required to present the data in non-verbal items like maps, charts, tables and diagrams.
When you are presenting a huge data to the audience/reader, you are required to present it in non-verbal items like maps, charts, tables and graphs. While converting the data into a diagrammatical representation you need to know which form of diagram suits the data better, how to convert the data, the steps and nuances involved in it. Simultaneously you should be able to decode the diagrammatical representations into either oral presentation or written document. ...