Which Visio formats are supported for import?
Use .vsdx or .vssx. Legacy .vsd/.vss files must be converted in Microsoft Visio first.

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Use .vsdx or .vssx. Legacy .vsd/.vss files must be converted in Microsoft Visio first.
Imported payloads preserve mxGraph style and geometry data so fills, strokes, gradients, and size can be rendered accurately.