Status bar in Slides Windows
Below the main slide display is the notes section, where you can write notes for each individual slide. Slide notes will not display on the presenting display.
At the very bottom of the Slides Editor, the orange status bar displays the number of slides in the presentation and the number of notes. There are also 
Fit to Page and 
Fit to Page Width buttons, as well as zoom levels that can be changed by using the 
Plus and 
Minus buttons, or by using the zoom slider that appears when clicking on the zoom percentage.