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

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 ...

If you own a Samsung Galaxy phone, you can use the preinstalled My Files app to add a PDF shortcut to your home screen. Open your file manager or Files app and locate the PDF file. Tap on the ...