Granted, this effect has been around for a while, but: (1) it's still widely used, (2) most people use a special plug-in filter to create it, and (3) if you don't use the plug-in, it's very complicated. Well, not anymore, Bunky, and that's why I included this new super-fast, super-easy version here in the book. See, I care.
Quick Tip: Change your view anytime
When you open a filter dialog, or any dialog such as Levels or Curves, most of your menus are grayed out while you're in that dialog. However, one menu that's almost always available is your View menu. Your keyboard shortcuts for accessing View menu items also still work, even though you're in a dialog box.
Try it for yourself: Open an image, bring up the ...