From gel to cream to pencil and beyond—there are more types of liner out there than you might think. Luckily, celebrity makeup artist Jamie Greenberg recently gave a quick rundown on TikTok to coach us through it. Here are the SparkNotes. You’ll most often see them in one of two forms: Either the tip comes attached to a pen where the ink slowly comes out, or there’s a pot filled with liquid ink that you dip the brush into. From there, you also have different brushes. “For example, you might want to use a micro-tip for a detailed wing,” she adds. Greenberg applies cream liner with a brush to have a bit more control over the finished look. She shows a few different brushes in her video, most of which are small, fine-haired liner brushes with a sharp diagonal angle.