viewports

/V Y UW1 P AO1 R T S/
noun
  1. 1

    A viewing window.

    โ€œacrylic plastic viewports in pressure vessels for human occupancyโ€

  2. 2

    A typically rectangular region representing the range or area currently being viewed.

    โ€œDragging the scroll-bar changes which part of the picture is visible within the viewport.โ€

verb
  1. 1

    To clip (an image or region) so that it fits in a viewport.

Source: https://en.wiktionary.org/wiki/viewport, https://en.wiktionary.org/wiki/viewports