Argh! It happened again and I just couldn't remember the key strokes. And it's hard to find the docs about it so I write my own right here. What's all that about?!

In X11, when you inadvertendly hit "Num Lock" on your keypad while you're holding the Shift key down, you actually turn ON this special Keypad feature: the Keypad becomes a mouse!

Hit Shift + NumLock again, and you get out of that mode (i.e. a toggle)

The Mouse controlled by Keypad feature is certainly neat when your mouse didn't work, but when you're trying to program and other such things (and your mouse is working just fine) it is very much in the way.

Okay! Now I can just look at my Linux page when I forget again.