If your friends don't have CMap, they can't work on your concept map. But you can make it available in several forms

 

You can produce a picture file from it, so they can view it in a graphics program or a web browser. Or you can make it into a web page, and web it on your site.

You can convert all your “propositions” as a text file, to provide a summary of the links between concepts ( a proposition is just one concept, a link and the attached concept in your map, eg Smoking causes diseases).

Or you could export it as XML, if you wanted to make it available in that form for interoperability purposes.

Either way, the File > Export Cmap As menu gives you several choices.

Be aware that the “Web Page” option generates a potentially large picture file, so it might not be as suitable as you might think at first.

 

Now you can see how to use the Cmap tool, you can apply it to a range of situations. For example:

 

This page written by Ken Price, President Tasite.