Easy mask of shadowed image using CorelDRAW

These three masks (making out black behind an RGB image of a SP-D image (credits to G Sorensen and J Griffith in prior posts).  Just changing the slider on the mask bar in CorelDRAW allows easy variation in highlighting the image of a multimer. Higher values of mask (60%) to the left, lesser mask values to the right.  All done in about 3 minutes.

CorelDRAW a great program for image processing electron micrographs