The output filename is taken from the first image in the series, replacing the frame number with a title set in the preferences. Also new are the alpha output options - transparent (premultiplied), flattened (removed), extracted (alpha only), and multiple files, which produces transparent, RGB, and A files for use in other tools that require straight RGB input (for example, ImageMagick doesn't support straight RGB in the TIF format, so multiple files are the only way to retain all RGB data). When scaling images to fit within specific dimensions, the scaling algorithm can be selected in the preferences side of the widget. While groups of files can contain any number of files and various file names, images are sorted lexicographically - full serial numbers are required for best results (0000 through 0100 will sort correctly, while 0 through 100 will not). Images can be a collection (select multiple files in Finder, then click-drag while opening up Dashboard, and releasing within the drop area), or a single image from a numerical series (Sheets will automatically gather the rest of the images for the sequence).

Large collections are automatically paginated when necessary. File sheets (also known as contact sheets) can also be generated, with file name and original size clearly labeled under each thumbnail. Using ImageMagick, animations can be output in strips, sheets, or with custom settings for scale and tiling. Sheets is an OS X widget that automates the process of building sprite sheets from image sequences.

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