From Adobe Acrobat to free online editors and built-in tools, here’s how to merge multiple PDFs into one document.

Sifting through multiple PDFs in search of relevant information can be a real test of patience, especially when you’re under a time crunch and manually going through each document is not an option.

Tap the Share icon (the square with the arrow). Scroll down and choose Print. On the preview screen, use two fingers to pinch outward. This instantly converts the preview into a PDF. Tap the Share ...