Go to “Data source settings” block and click “Add new”. Select SharePoint list as a data source.
Type data source name and select SharePoint site that contains the required list. You can also select a specific list view (including custom views) to display items.
Now match fields of facet categories and SharePoint list fields in “Mapping fields” block.
Note: “Name” field is required.
Then you need do define image settings for Pivot View. Define width and height of images (in pixels).
For example, the left picture has 512x512 px size, and the picture form another data source on the right has 300x300 px size.
Note: page load time depends on image size. Do not define too large size for images in the Pivot View.
Note: free version of Virto Pivot View allows up to 300 items in the list
Then move to image settings block and define parameters of displayed images.