Thumbnail Types menu

Use this menu to select the depth(s) at which to create thumbnails.

Click here for black & white thumbnails to be dithered when they are created from color or grayscale images.

Note: Dithering results in better quality thumbnails, but it is slower.

Click here to display a QuickTime Standard Single-Frame Image Compression dialog box.

Codec menu

Use this menu to select from among the compressor/decompressor’s that can perform the specified compression/decompression.