Pop-up Example

Often your notes may include terms or concepts that students should be familiar with, but you want to provide a reminder for those who don't remember them.  In addition, you may want to define certain terms without disrupting the continuity of your notes.  Here is an example.

Pop-up windows are popular for small sidebar-style pages that are digressions from the main page. With pop-up windows, a user can display a secondary web page in a smaller pop-up window by clicking on a link.