# About Linking External and User Style Sheets

A document can link to several external style sheets that are downloaded with the document and applied to it.

An external style sheet can apply to multiple documents. When the same style sheet applies to several displayed documents, Amaya loads only one instance of the style sheet.

Any user can define a specific style sheet that applies to all documents loaded on their system. This style sheet is called the user's style sheet. It is stored in the user's local environment, in the `AmayaHome` directory as the local file `amaya.css`.

For example, if you prefer to display documents in Helvetica on your screen and print them in small size, you can create a user's style sheet with following CSS rules:

`@media print {
body {font-size: 10pt}
}
@media screen {
body {font-family: Helvetica}
}`