Cytosketch provides a button for merging images. To merge, select the images and click the Merge button . Cytosketch automatically merges the selected images if each channel has a unique color. If two or more channels have the same color, a simple merge dialog appears for manually selecting the channels.
To change the color of the channel click the Color button in the Adjust Image Control box and choose a new color from the drop down list.
Below is a short movie that shows how to merge images