Miniature visualizations are number tiles that are created when you scale a visual down. These tiles display the measure(s) in the content item, providing a way to easily view and interpret important data at a glance.
When in edit mode, if you shrink the visual it will be displayed as a tile with a value of zero. When the presentation is launched in runtime, the tile displays the visual's measure(s).
Miniature visualizations may be disabled or enabled from the Present Lite ribbon. Miniature visuals for mobile device mode are enabled by default. To disable miniature visuals, click on the relevant visual and then select Miniature Auto from the ribbon (green arrow below).