LRGB Merging Procedure
Select the L, R, G, and B images using the 4 Image Tree controls.
Specify the Min Value and Max Value settings. [more]
Set the Quick option: [more]
For a trial result (not the final result) check the Quick box.
When the brightness, contrast, and color balance are acceptable, un-check Quick to allow the Sharpen and De-speckle options to take effect.
Click [Merge] to combine the channel images. [more]
Examine the merged image. if it is very close to the final result, you are done. [more]
If the brightness, contrast, or color balance are not what you want, go to step 2.