Leopard users already appreciated this wonderful feature for previewing files. But maybe that's not all know how to improve the use of Quick Look, applying some tweaks.
For example, if you select multiple images in a folder and open the context menu with the mouse, there is an option "Quick Look X Items«. «X» - is the number of selected files, images. QL will open and you can not completely flipping through the contents of folders, view individual files. In the Quick Look window will also choose the view format - full-screen mode, mosaic, or start a slideshow of the selected files.
In addition, the Quick Look has a zoom - to increase the use preview button Option + mouse button to decrease the Shift + Option and the mouse button. When you zumiruete image, you can move through the zoomed preview - the cursor will change to a cross of arrows.
But that's not all! Try to run the Quick Look on any file from your iTunes library. Or on any video.
If you know some other good advice, we will be glad to hear it in the comments!