... jumping directly to the top or bottom of your document (or Finder window). And if you've bought a mouse that has a scroll wheel on the top, you can use it to scroll windows, too, without pressing ... scroll bars altogether. Your Page Up and Page Down keys let you scroll up and down, one screen at a time, without having to take your hands off the keyboard to grab the mouse. The Home and End keys, ... of that helps you, however, if you want to move a file from one folder into another, or compare the contents of two windows. In that case, you probably want to see both windows open at the...