Be Precise

If you want a more precise cursor, press the Caps Lock key. For many (but not all) tools, the tool cursor will change to a crosshair. To switch back to the regular tool cursors, release the Caps Lock key. Here's another way to look at this: If you use a tool and suddenly it isn't looking like the normal tool icon anymore, chances are the Caps Lock key is on. Turn off Caps Lock and there's your tool icon again.