Prediction allows you to disable prediction temporarily for any window by typing 0 (zero). To turn prediction back on, type ;0 (semicolon, zero). This feature is particularly useful when you want to type numbers where those numbers would usually select words from the prediction box. Note that if you switch to another window, that prediction will come back on for that window, then turn off again when you switch back. This feature only turns prediction on and off for a single window.