On: Design structured diagrams, built to increase your...

[ta988]

Have a look at diagrams.net, you can run it locally, and there are quite a few interactive elements (panels you can close and this kind of stuff).

[Datagenerator → ta988]

Having used Visio and Diagrams.net, Visio really is the least productive one. Constantly fighting with the unpleasantness of applying little tweaks made it my 3rd choice. 1) Diagrams.net 2) PlantUML 3) Visio