Definitions for "Rulers"
Measurement aids found along two edges of the layout display window. The rulers have a zero point that can be repositioned to any point on the screen for convenient measurement.
The bars along the top and left of the workspace that help you measure your picture and the objects in it.
Guides on screen display to enable accurate measurements.
Keywords:  align, slide, help, size, objects
Use rulers to help align and size objects on your slide.