Flowchart Symbols. Flowcharts use special shapes to represent different types of actions or steps in a process. Lines and arrows show the sequence of the steps, and the relationships among them. These are known as flowchart symbols.Different Types of Flowcharts and Flowchart UsesLearn about different types of flowcharts and how they''re used. There is a process flowchart, swimlane flowchart, workflow chart, data flow diagram, EPC diagram, SDL diagram, process map, decision flowchart, among others. Flowcharts help you document processes, map program algorithms, plan projects, make decisions, and more.