Before you view/export elevation data, you can view the data source by clicking on a polygon while in the Site Builder menu. When you click on a polygon, the attribute table will open in the bottom left. Scroll down to find “metadata_link” and click the link in the table to visit the source website.

Metadata_link is highlighted in blue 

After processing elevation data, and adding a new layer to your project (e.g. contours, 3D surface, or point cloud) you can also find source information in the “Layer” menu.

Click on the layer to open the formatting menu, click on “Show Description,” then click on the metadata link.

Click on “Show Description”

Click on metadata link