Yes they both can.
insertion point
scroll box
The scroll bar at the right of the screen reflects the location of the portion of the document that is displayed on the screen. When using a program like Adobe Reader, a person can hover the mouse over the scroll bar on the right of the screen to locate the page and line of the document.
Scroll Box
False- it is reflected in the scroll box
Scroll Bars
scroll bar
Scroll box
Scroll Bar
If you're talking about navigating a document or perhaps a website, the arrow keys can move you around. If you're tying a document and want to immediately jump the end or beginning of the current line you're residing on, you can use the HOME and END keys. PAGE UP and PAGE DOWN also will scroll up and down, but will scroll more at a time than the arrow keys.
Vertical Scroll Bar
Vertical Scroll Bar