Google updated the guides option so that you can add your own guidelines for placement of objects in your slides. The rulers tool was updated with finer controls and indentations.
You will find guides and rulers in Google Slides in the "view" drop-down menu in Google Slides. Select "show ruler" to display the updated ruler on your slide editor. Select "guides" to view the pre-defined guidelines and or add your own guidelines.
Applications for Education
Whether we're teachers, administrators, or students we all want to make our presentations look good. The updated guides and rulers options in Google Slides can help everyone make their presentations a little bit better.
Learn more about Google Slides in my online course, G Suite for Teachers. The course is on sale now through Monday.