Atlas now contains native diagramming capabilities that you can use as Concept or Requirement types. The vast Shapes library contains the following for standard diagrams: BPMN, UML, Flowcharts, Use Case, Lean Mapping, Process Engineering, SysML, EIP, Cisco, AWS, Azure, and more. For mockups, there are shapes for Windows Applications, Internet Applications, iOS, and Android.
Watch a video to learn how to diagram
here.