Google Slides Background Image Aspect Ratio. The aspect ratio of an element describes the proportional relationship between its width and its height. It is reduced to the smallest usable ratio (using math Aspect ratios in video are very much like still photography.
Google Presentation is one of the applications included in the Google Docs office suite that lets users create slideshow presentation online without downloading any software.
Alternatively, to select a custom size or to change other slide aspects, select the "Custom Slide Sizeā¦" command from the drop-down menu to open the "Slide Size" dialog box.
The page must retain the aspect ratios of the image and must be centered to the page. You will recognize it as two numbers separated by a colon in an x:y format. The aspect ratio of an element describes the proportional relationship between its width and its height.