A "top toggle" (often called a Top Tab Bar or Segmented Control) lives in the upper quadrant of the screen. Unlike bottom navigation which changes entire modules, the top toggle usually changes sub-views within the same parent screen.
This is often used to switch between a chart and a table view within the same screen space. how to toggle between screens top
Most operating systems use a meta-key (Windows logo or Command) plus the relative direction of the screen. A "top toggle" (often called a Top Tab