There are a few ways to open glyphs in After Effects. One way is to use the Glyphs panel. To open the Glyphs panel, click on the Window menu and select Glyphs. The Glyphs panel will display all of the glyphs in your project. You can also open the Glyphs panel by pressing Command + G (Mac) or Ctrl + G (Windows). Another way to open glyphs is to use the keyboard shortcuts.