A family of Microsoft word processing software products for creating web, email, and print documents.
Even after making sure the scroll bar is displaying, based on the info Phillip has provided, you still will not see an "arrow" button in the scroll bar in Word 2016 for the Mac. The Microsoft Word Development Team decided that arrow controls were are needed and just "click-hold-drag" on the bubble is sufficient... even for fine precision controlled scrolling.
IMHO, you should not be too enamored with the Windows version of Office 2016 because even though it does have the arrow button, clicking them usually result in an uncontrolled forward or backward scrolling within the document.
Unfortunately proper programming techniques and methods is quickly becoming a lost science.