A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
1
On your keyboard, if there is a scroll lock key (ScrLk), try tapping that key or Fn + that key to check if Scroll Lock was enabled.
2
If that was not the problem, try tapping the Esc key a couple of times.
3
If that was not the problem, try tapping the F8 hey or Fn + F8 on your keyboard to disable extended mode.