Marmaidで flowchart に対するNoteをつける回避策

• subgraphを利用する

flowchart TB

    subgraph A
        A-DESC("Description1:Properties of A")
    end

    subgraph F
        F-DESC("Description1:Properties of F")
    end

    subgraph C
        C-DESC("
        Description1:Properties of C
        Description1:Properties of C
        ")
    end

    A -->|"Description2:A how to B"| B --> C
    B --> D
    D -.-> F

Refs

https://github.com/mermaid-js/mermaid/issues/2712#issuecomment-1054088185