100% Preview, also called full-size cache, is a JPEG file that displays the 100% zoom-in. This zoom-in is what you see in a slideshow and in full-screen preview. It is also what you see when you use the Loupe tool in Review mode or the Preview panel. When you use this cached file, you avoid rerendering a 100% image from the original source file. However, it does require additional disk space and initial processing takes some time.
When you use the Loupe tool or 100% zoom, this 100% preview is extracted into memory from the file. The Keep 100% Previews In Cache option allows the 100% preview to be written to the central cache, which is in the following location:
- Mac OS: /Users/[User name]/Library/Caches/Adobe/Bridge CS[version number]/Cache/full
- Windows: /Documents and Settings/[User name]/Application Data/Adobe/Bridge CS[version number]/Cache/full
Note: On Windows, turn on Show Hidden Files to see this location. See Show hidden files, folders, filename extensions | Windows XP, Vista, Windows 7.
You can also generate full-size previews for all files in a folder. Click the thumbnail and preview quality button in the Application bar and choose Generate 100% Previews. These full-size previews are only used for 100% zoom and loupe, however. They are not used to display thumbnails, slideshows, and screen previews in less than 100% view. Also, they aren't used in the Preview panel or Review mode when you are not using the Loupe tool.