Open an existing project in Logic Express. You can double-click the project file itself or you can open Logic Express and select "File" and "Open" from the menu bar.
Select the "Text" tool. It looks like a vertical line and appears in the upper right corner of your "Arrange" window (the main project window).
Click any region that you would like to name, using your mouse. You can click anywhere within the shaded space. A horizontal text box appears. Remember that your regions are all of your recordings, which look like colored horizontal bars. They can appear either red, blue, purple, yellow or green, depending on the type of region.
Enter a name for your region and press "Enter." The name now appears in the upper left corner of the region space.