• Keep Layers: ensures that any existing layers are maintained and the selected treatment is saved in its own separate layer. Note that the LAB Conversion treatments do not keep existing layers. It's not possible in Photoshop to do this.

• Convert to Layers: If you have chosen multiple treatments, by default, these are saved as history snapshots. Checking this option will create a single snapshot that contains one layer for each treatment.

• Use Dupe Doc: if this options is checked, the conversion is applied to a copy of the image. The original is left untouched.

• All Treatments: This option toggles the selection of all treatments on and off. (This was added as a result of a user request, please do e-mail with suggestions and requests.)

• Large Previews: Checking this option will produce larger previews. The size of small and large previews can be customised in Preferences.

• Preview Selection: if this options is checked, the script will use the active selection to create previews. The active selection must be defined using the marquee tool before the script is started.

Extras

These are additional processing options that will be applied after the B&W conversion. Each effect comes into two strengths, but both boxes may be checked for maximum effect. The different effects may be combined - although, it probably doesn't make much sense to use both contrast plus and contrast minus.