ScrollingSettings.ScrollSpeed Attached Property
Gets or sets the speed of scrolling (in pixels per second). This property is in effect when scrolling using scroll buttons. This is an attached property.
A double precision floating-point value specifying the scrolling speed (in pixels per second).
Use the ScrollSpeed property to specify the speed of scrolling, which is performed by an end-user by pressing and holding a scroll button.
You can define the acceleration and deceleration ratios affecting the scrolling speed, each time scrolling starts and finishes.
To learn more, see the Scrolling topic.