One of the many “hidden” features of Google Slides is found in the view menu. It’s there that you’ll find the option to turn on and turn off gridlines (Google calls them guides). Not only can you turn on or turn off the guidelines, you can also add additional lines and create custom spacing for the guidelines that you add to your slides. Watch my video that is embedded below to learn how to add custom guidelines to your Google Slides and why you might want to do that.