iPiece
iPiece will show a magnifier window right next to your cursor. Whenever you want to see things closer, press its hot key, or double-click the eyeglasses icon in the menu bar and iPiece's magnifier will appear. When you're done with the magnifier, double-click the icon again and it will disappear until you want it back.
iPiece improves on Mac OS X's zoom capability by letting you see all of your work while viewing the part you're most interested in up close. It also works more naturally across multiple monitors and lets you set specific known zoom levels. It also alleviates the need to zoom back out when you're done magnifying and doesn't get in your way by taking up a permanent part of your screen like some other screen magnifiers.
Tags: magnify , glass , screen , zoom , magnifier , magnifying




2 Opinions:
No, it's not the same thing. Using the zoom keyboard shortcuts in OS X will magnify the entire screen so that parts of the screen move out of view. This makes moving around the screen tedious and unpredictable. If you can't see it, you have to move the mouse in the direction where you think it is and let the view scroll to that location. In the case of a dual monitor setup, it's sometimes even impossible, since the cursor will get confused about which screen it is on and will not scroll the screen when you move the cursor to the edge. That said, it's perfectly fine if all you want to do is zoom in on a movie.
iPiece magnifies an area of the screen around the mouse, so the rest of the screen is still visible at normal magnification. This lets you use the entire monitor to see everything on your screen but zoom in on an area of interest at the same time. It's not designed for people who want to zoom in on a movie, but rather for people who want to get real work done, either reading tiny print or doing precision mousing in a program like Illustrator or Photoshop.
It's also different in that there's no hot key command to remember (though this is a feature I'm considering adding for people who want it). iPiece sits unobtrusively in the menubar until you need it, and is ready at the click of a mouse.
Of course, you could download it and try it for free and discover this for yourself.
I've never tried it, but can't this behaviour be obtain by the OS alone? In Universal Access preference pane, you can set keystrokes to zoom in/out of the screen. You can turn this on or off. I personnally use that feature when viewing (non-resizeable) movies embed in websites (ie: in flash) and to cover the whole screen. You never have to squint again.