Categorise a single hidden file

The first thing you have to do is show hidden files which is done as follows:
1. On the Tools menu, click Site Settings.
2. Click the Advanced tab, and then select the Show hidden files and folders check box.
3. To cartegorise a single hidden file do the following: On the View menu, point to Reports, point to Workflow, and then click Categories.
4. Right-click the file, and then click Properties on the shortcut menu.
5. Click the Workgroup tab.
6. In the Available Categories box, select the check boxes for the categories that apply to the file.