Merge PDF files in the right order — a quick guide

Merging is the most common PDF job: a cover letter, a CV and certificates become one tidy file. A few habits save you from sending the wrong order.

1. Add all your files at once, then drag them into the order you want.
2. Preview the thumbnails to catch a wrong or upside-down page.
3. Merge, then use Organize to delete or rotate any page that needs it.
4. Name the final file clearly, for example Application-Rahim-2026.pdf.

Mixed page sizes

If one file is A4 and another is Letter, the merged PDF keeps each page at its own size. That is fine on screen, but may print oddly. Crop or rescale pages first if the result will be printed.