View Contents as lets you determine the type of files that you want to display a preview of when the Display Mode is Content.
When your file system contains icon and raster files created by applications, such as Icon Editor and Snapshot, you can display an image of the contents of the file in place of the standard data file icon. The images are displayed to scale in a 64-by-64 pixel square.
Choosing Content as your default Display Mode in the New Folder Defaults window displays the contents of black-and-white and color icons, rasters, X bitmap files, or any combination of these. Folders, applications, and other files are displayed as icons. Figure 2-42 is an example of a Contents file display.
Choosing to display the contents of icon and raster files can delay the reading and displaying of other types of files and folders since File Manager must perform some additional processing to provide the preview.
Monochrome Icons, to preview black-and-white Sun icons
Monochrome Images, to preview black-and-white Sun raster and X Bitmap images
Color Icons, to preview XPM files