What you get: every embedded raster image (PNG / JPEG / TIFF) found in the PDF, downloaded as a ZIP. Vector graphics (lines, paths, drawn shapes) are not exported as images — they're part of the page itself, not separate image objects.

For scanned PDFs you usually get one large image per page. For rendered text PDFs with figures, you get just the figures. If you need a screenshot of the whole page, use PDF to Images.