mwg API
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    Interface VerticalLayoutOptions

    interface VerticalLayoutOptions {
        columnHeight: number;
        lineHeight: number;
        rotate?: RegExp;
    }
    Index
    columnHeight: number

    a column wraps to a new one, further left, once it reaches this height

    lineHeight: number
    rotate?: RegExp

    characters matching this are rotated a quarter turn rather than kept upright