scrolling-lexicon.md

Term	Meaning
Content Area	The total area of content that can be scrolled, defined by @Terminal.Gui.View.GetContentSize. When larger than the Viewport, scrolling is enabled.
Scroll	The act of causing content to move either horizontally or vertically within the @Terminal.Gui.View.Viewport. Also referred to as "Content Scrolling".
ScrollBar	Indicates the size of scrollable content and controls the position of the visible content, either vertically or horizontally. At each end, a @Terminal.Gui.Button is provided, one to scroll up or left and one to scroll down or right. Between the buttons is a @Terminal.Gui.ScrollSlider that can be dragged to control the position of the visible content. The ScrollSlider is sized to show the proportion of the scrollable content to the size of the @Terminal.Gui.View.Viewport.
ScrollSlider	A visual indicator that shows the proportion of the scrollable content to the size of the @Terminal.Gui.View.Viewport and allows the user to use the mouse to scroll.
Viewport	The scrollable "viewport" into the View's Content Area (which is defined by the return value of @Terminal.Gui.View.GetContentSize). See Layout Deep Dive for more details.
ViewportSettings	Configuration flags that adjust the behavior of scrolling, including whether negative coordinates are allowed and how clipping is applied.