1. Select multiple files
Select multiple files and folders by holding down the Command or Shift key as you click with the mouse. This also lets you select non-continuous items, so you can skip those that you don’t need. You can then drag them all to another location as one, or duplicate or copy them all in one go.
2. Open multiple files
Open multiple files and folders as one by hitting Command + [O]. Folders will show their contents, and any files selected will open in their respective applications.
3. Transfer multiple files
If you need to email or transfer a group of files, say via iChat or FTP, multiple-select the items or group them into a folder. Then right-click on the folder or items and choose Create Archive or Compress (depending on your version of OS X). Finder will then create a zip file containing all the items. The overall file size will now be smaller, so sending the email will also be quicker. More »