Upon launch, the colour module blinks the mask three times in the familiar way. If a full mask is not set, the Color modules allows you to set it now, as colour balancing is typically applied to the full image (requiring a full mask).
In addition to blinking the mask, the Color module also analyses the image and sets the 'Red, Green and Blue Increase/Reduce' parameters to a value which it deems the most appropriate for your image. This behaviour is identical to manually clicking the 'Sample' button where the whole image is sampled.
In cases where the image contains aberrant colour information in the highlights, for example due to chromatic aberration or slight channel misalignment/discrepancies, then this initial colour balance may be significantly incorrect and may need further correction. The aberrant colour information in the highlights itself, can be repaired using the 'Highlight Repair' parameter.
Luminance retention in CIELab color space is applied afterwards.
Exclusive to the main screen, the buttons that activate the different modules, reside on the left hand side of the main screen.
The Unified De-Noise module offers detail-aware, astro-specific noise reduction.
The two aspects - colour and luminance - of your image are neatly separated thanks to StarTools' signal evolution Tracking engine.
Through the Compose module, StarTools is able to process luminance and color information separately, yet simultaneously.
You can convert everything you see to a format you find convenient. Give it a try!