Imaging the following situation where you want to export an XSLT List View web part and embed it on a different site. So the good thing about this it’s easy to accomplish. I came across a great article posted by Glyn on his blog how to export an xslt viewer web part. He shows in his article some really great insight how the xslt viewer web part can be exported. The only thing he left out is that you can export XSLT List View web parts using SharePoint Designer. This feature is really well hidden in the ribbon.
In SharePoint Designer simply select the XSLT List View web part you want to export. In the Ribbon you will find a specific menu for this web part. Ribbon for the web part comes up you can select inside the “Web Part” Tab. In the far right area of the ribbon you will find two really helpful menus.
The “To Site Gallery” option will copy the web part to your site collection web part gallery. You will also be asked how you want to name your web part, description and you will be able to change properties.
Another option to select is if you want to use it relative to any site where the web part will be embedded or get data only from the current site.
The “To File” option will open the download dialog to store the web part and the configuration to a file.
As you see it’s easy to export a XSLT list view web part and use it the way you like. You can also cross embed lists from one web into another.