UI Scrollbar
The UI Scrollbar object allows the user to drag a handle along a path. The position of the handle on the path affects the position of an image or objects within a usable area.
If you're having trouble seeing what a scroll bar is from the preceding description, it is most commonly used in video games with menus that have a lot of information within a viewable area that is smaller than the area that all the information takes up.
To create a UI Scrollbar, select Create | UI | Scrollbar. By default, a UI Scrollbar has a child named Sliding Area. The Sliding Area also has a child named Handle.
The Sliding Area child is an empty GameObject. Its purpose is to ensure that its child, the Handle, is correctly positioned and aligned. The Handle is a UI Image. The Handle represents the interactable area of the Scrollbar.
Unlike the Toggle and Slider GameObjects, the background image of the Scrollbar is actually on the main Scrollbar parent object and not on a child named Background. Therefore...
