Guide for Document and Photo to PDF Composition: Page Size, Order and Margin Control

The OKfmt photo to PDF converter generates corresponding pages in a single PDF file according to the order users upload photos, and the upload order corresponds to the page number order of the final PDF. After uploading is completed, users can delete incorrect images and re-upload them to adjust the page order.

A single photo corresponds to a single page of the PDF, and all uploaded photos will eventually be merged into a single PDF file, which meets the single-file requirement for archiving and submitting materials in most scenarios. This rule applies to all processable image formats, regardless of shooting source or format.

The OKfmt photo to PDF converter provides three page settings: fixed A4 size, fixed Letter size, and original image adaptive size. The fixed size mode fits all photos into a standard paper page of uniform specification, which is suitable for print output scenarios.

The original image adaptive size mode retains the original aspect ratio of the photo, maps the original photo size to the PDF page size, and is suitable for archiving scenarios that are only viewed on electronic screens. It will not add extra blank areas to increase the PDF file size.

The OKfmt photo to PDF converter supports custom margin settings ranging from 0mm to 50mm, allowing users to adjust margin width according to usage scenarios. When a 0mm margin is set, the photo content will cover the entire PDF page with no extra blank area.

Most household and office printers have a physical unprintable area of 2mm to 4mm. If the margin is set to 0mm and the photo content is close to the edge, the edge content will be cropped during printing. For materials that require print output, set a margin of 5mm to 10mm to avoid content loss.

Vertically shot photos taken with mobile phones record the shooting orientation in EXIF information. The OKfmt photo to PDF converter automatically reads the EXIF orientation information to complete orientation correction. The orientation of the PDF page after composition matches the actual shooting orientation, and no manual rotation adjustment is required from the user.

The output quality parameter of the tool ranges from 1 to 100. The lower the parameter value, the smaller the output PDF file size, and the more image detail is lost. The higher the parameter value, the more complete the image details, and the larger the PDF file size. The PDF file size at quality level 10 is approximately 1/10 of that at quality level 100, to meet different storage requirements.