A trap for Web designers (and others): the default setting on both Windows and Mac is to hide file extensions. This means that a file that’s really called MyFile.txt looks as though it’s called MyFile. Web designers need to know whether it’s MyFile.txt or MyFile.html or MyFile.jpg and so on.
To put this right and to have more control over what you’re seeing on your computer take these easy steps.
Mac OS X users
Go to the Finder and choose Finder menu — Preferences — Advanced. Now check the box for Show all file extensions.
- Open My Computer / Windows Explorer.
- Tools — Folder Options
- Uncheck “Hide file extentions for known file types”
- Apply and OK
With thanks to the Wise Women mailing list for the discussion and the Windows instructions.