You can create your own thumbnail view element that scrolls horizontally, and use the loadThumbnailAsync api to get thumbnails to append.
Here is an example of using loadThumbnailAsync api:
$(document).on('documentLoaded', function() {
var doc = readerControl.docViewer.getDocument();
doc.loadThumbnailAsync(pageIndex, function(thumb) {
myHorizontalElement.append(thumb);
});
});
Justin Jung
Software Developer
PDFTron Systems Inc.