You can create a data layer that captures all files with specified extensions (for example, all files with a .doc extension). Files with specified extensions are captured even if they are generated outside of the layer.
You can also create a data layer for a specific directory (for example, the My Documents folder). When you specify a directory, you can include its subdirectories. Any files that are saved into this directory are saved in the data layer.
When a data layer is activated on a computer, files that already exist on the computer are not automatically captured into the layer. However, any files that match the specifications of the data layer are redirected to the layer when they are modified.
To create a data layer
On the second dialog box, type a name for the layer. In the Data layer details section, click either the File extension(s) separated by semi-colon or Directory option, and then specify the extensions or directory. Layer names are limited to 50 characters.