It's easy to lose your cursor while editing a Word document. I routinely am looking for my cursor after adding index entries for my 200+ page family tree book (just names, dates, and places as a reference).
In older versions of Word, if you scroll off the page where your cursor is located, all you have to do is press an arrow key and Word returned you to the location of your cursor.
In newer versions of Word, arrow key pressing doesn't work. However, if you press a key combination, you can return to the location of your cursor: Shift + F5.
Learning keyboard combinations adds to your ability to control Word and is a first step in becoming a power user of the software.