After years of idle curiosity, I finally found out what the "Scroll Lock" key on my keyboard does.

For the most part, it does nothing. However, in a few select programs it actually changes the behavior of the up/down arrow keys and the page-up/page-down keys, the most common (these days possibly the only?) program being Excel.

In Excel, with Scroll Lock disabled (the default), the up/down keys change which cell on the screen is highlighted. If you enable Scroll Lock, then the up/down keys don't change which cell is highlighted, but instead scroll the entire screen up and down.

Just thought you might like to know...

tanstaafl.