The iDocs for Windows Map File Editor is a tool for editing map files created by iMap. It can be used to alter the specified configuration of mapped fields created by iMap; it is not possible to create a mapped field directly in the editor.
As of this time color iMap map files are not supported.
To use, from the pull-down menu select the mapped field that you wish to change. Then tab through the field edit, make changes, and press save to save the changes.