You're able to build PDFs in the Preview tool too: As long as you have a PDF open in Preview, you can drag any file type into the table of contents sidebar on the left to add it as an extra page.

If you don’t need all the files in a ZIP file, you can extract a single file from it. First, locate and double-click the ZIP file to open it. Next, click the file you want to unzip to select it.

Learn how to use tools to create, annotate, and extract text from a PDF on a Chromebook.

Open the Files app and browse through your files, or use the search bar to find the zip file you want to unzip. Tap on the zip file and select the Extract option.

Whether you're trying to send a large file or just manage your storage space, being able to zip and unzip files on your iPhone or iPad is incredibly useful.