If you add a column to your SharePoint list and set the type to Hyperlink or Picture

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you can create list items that contain hyperlinks that can be navigated by simply clicking on the column in the list view.

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The nice thing about this column type is that if you data link a Visio shape to this list, the Hyperlink is automatically created for you…

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and if you update the URL in the SharePoint list, the hyperlink in the linked shape is also automatically updated when the data is refreshed.