This adds a 'watch it' choice to the context menus in text editors. This will take the selection, make a BlockContext out of it, and give you a Morph that will display the value of that block every half second.
It can be used, for instance, from the Debugger to display an instance variable as your program runs.
Try, for instance, watching this:
World currentHand cursorPoint
Only works in Morphic; results in an inspector being put up for the resultant block under MVC (you can evaluate 'self value' in that inspector if you want).