# Tooltips Use the [<tooltip>](semantic-markup-reference.html#tooltip) element to mark words as terms that your reader can hover to see a tooltip with a description. Procedure: Add tooltips 1. If your project does not already have one, create `glossary.xml` in the [cfg directory](help-modules.html#build-config-dir) and define the terms and descriptions in it. For example: ```XML Graphical User Interface Hypertext Transfer Protocol ``` > **Tip:** > To create the `glossary.xml` file, you can right-click the [build configuration directory](help-modules.html#build-config-dir) (`cfg` by default) in the Project tool window, select New, and then click glossary.xml. 2. In a topic file, wrap the text you want to explain with [<tooltip>](semantic-markup-reference.html#tooltip) and specify the name in the [term](semantic-markup-reference.html#tooltip_term) attribute. For example: ```XML Send an HTTP request. ``` Here is how it will render: Send an HTTP request.