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is a simple viewer for document files in the portable document format (PDF). It uses the Poppler library for rendering and the Qt toolkit for its interface.
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If an instance of qpdfview is started with this option, any files that are opened using this option afterwards, are opened as tabs in the original window. If a file is already opened in a tab of the original window, it is merely reloaded.
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as the name of the instance contacted or created using the "\-\-unique" option. This allows one to run multiple instances and remotely open and refresh tabs in any of them by passing the instance name.
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specifies the file to open. The optional parameter