A receipt, a whiteboard after the meeting, three pages of a contract photographed on the kitchen table. Your iPhone saved them as HEIC, and the place that wants them wants one PDF. Add them here. HEIC and HEIF photos go in, recognised from what is inside the file rather than its name; a JPG, PNG or WebP that ends up here is stopped on its card with a link to the sibling made for it, and the rest carry on. On an iPhone or iPad the photo library can hand a website a JPG instead of the HEIC, so there a JPG's card says so and lets you choose: continue with the JPG, or pick the original HEIC from Files. Each photo becomes a page, upright the way your phone took it, and the number on its card is its page number. Drag a card to move it, or open its menu and use Move to… to type a page number. The settings button shows the page setup, for example A4 · Automatic · Small margin. Every photo is scaled to fit inside the margins without being cropped. Fit to image makes each page the shape of its photo instead. Tap Save PDF; on an iPhone or iPad it reads Prepare PDF, and Save or share then hands the PDF to the share sheet, where you pick Files or another app. A PDF cannot hold HEIC itself, so each photo goes in as a high-quality JPG, and the wide colours of iPhone photos are converted to the standard colours PDF readers expect. Because JPG is less compact than HEIC, the PDF usually comes out larger than your photos. Smaller file brings large photos down to 2000 px on the long side, and only where that really makes the file smaller. What stays out: the location, dates and camera details stored in your photos, the video part of a Live Photo, and your file names. Text in a photo stays a picture of text, so you can read it but not search it. My guides cover HEIC versus HEIF, orientation and colour, combining many photos, and getting photos off an iPhone as HEIC.