How to Create an Alias in Mountain Lion
When you create an alias in Mac OS X Mountain Lion, its icon looks the same as the icon that it represents, but the suffix alias is tacked onto its name, and a tiny arrow called a badge (as shown in the margin) appears in the bottom-left corner of its icon. Here is an alias and its parent icon — the icon that opens if you double-click the alias.
To create an alias for an icon, do one of the following:
Click the parent icon and choose File→Make Alias.
Click the parent icon and press cmd+L.
Click the parent icon and use the Action menu’s Make Alias command.
Click an icon while holding down the Control key and then choose the Make Alias command from the contextual menu that appears.
Click any file or folder, press and hold down cmd+Option, and then drag the file or folder while continuing to hold down cmd+Option. Presto! An alias appears where you release the mouse button.
When you first create a file, save it in its proper folder inside the Documents folder in your Home folder. If it’s a document that you plan to work on for more than a day or two, make an alias of the document (or folder) and plop it on your Desktop. After you finish the document, trash the alias, leaving the original file safe and sound in its proper folder.