Use the arrows below the color worksheet, or the right-click Context menu, to change the order of the color blocks, and to choose color blocks to merge together selectively.
For example, you can keep two adjacent identical color blocks in case you wish to vary them later. If you use ColorSort, all identical colors will be merged unless there are overlapping stitches.
The changes you make are applied immediately.
This may be useful if you want to merge two blocks of an identical thread color without affecting the color order of the rest of the embroidery. For example, use Move and Merge Color Blocks to assist in creating lettering with some characters in varying colors. Alternatively, the Move and Merge Color Blocks functions may be useful if ColorSort does not merge colors owing to a few overlapping stitches that do not affect the design stitchout.
You can also use Merge when optimizing designs with multiple areas of cutwork and stabilizing lines. ColorSort may occasionally merge stabilizing lines in these circumstances.
The Move Up 
and Move Down 
buttons move the selected color block so that the colors are stitched in a different order. Click the required color in the list and it will be highlighted, then click the Move Up or Move Down button to move the color to the required position.
Alternatively, right-click the block and select Move Up or Move Down from the Context menu.
The Merge Colors button 
will merge the selected color block with the color block above it, removing the Color Change command.
Alternatively, right-click the block and select Merge into Previous Color 
or Merge into Next Color from the Context menu.
Use Merge to delete color changes. Also use it to merge color blocks with the same thread color, after first moving one of the color blocks so that they are adjacent.