Add two landscape images, choose A4, Auto and Large margin. Each page becomes 841.89 × 595.28 points. The available rectangle is 769.89 × 523.28 points after 36-point margins on all edges; each image is uniformly scaled and centered without cropping.
Compare the page with the source
Check that the download contains two landscape A4 pages, one for each queued image, in the same order. Large margins reserve at least 36 points on every side. Uniform scaling can leave extra whitespace on one pair of sides when the image and available rectangle have different proportions; that is centering, not cropping. Compare all four image edges with the originals.
Inspect the exact download
Open the downloaded PDF, count its pages, scan the first and last page, and confirm rotation, margins, sharpness and order. Keep the source images because a successful browser export does not certify suitability for a particular destination.