As much as I hate editing Excel / LibreOffice Calc sheets, it is sometimes necessary. While doing so recently, I noticed I was all of a sudden scrolling the entire document with the arrow keys, as opposed to switching cells. I found out that this was apparently expected behavior, when ScrLK (or “ScrollLock”) is active. Only, I was using one of my Lenovo laptops at the time. It doesn’t have a ScrLK key.
So, after some searching I found out that the answer is, as it often is, the Fn key. The following keyboard combinations work on many Lenovo laptops:
Break (FN + B)
SysRq (FN + S)
ScrLK (FN + K)
Pause (FN + P)