An architect vetting last-minute changes can call up blueprints into the Zanvas window and visibly underscore various components, while the client scrutinises the revisions from a personal computer located elsewhere on the Internet.

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Between them, the three components of each of the planned buildings have about a dozen different plans for window configurations and setbacks, an effect the architects intended to help reflect the architectural diversity of the area.

WSJ: Barclays Center's Exercise in Bland