Menu output vertical

CMW does not provide a specific option to make a menu display horizontally. Styling of the menu is down to your theme: if your theme has a class that sets an unordered list (UL element) to show horizontally, then you can apply that class via the CMW options; otherwise, you will need to add the appropriate CSS rules to your theme yourself.

You might like to check out this thread? There are probably a couple of others too, if you search WordPress for something like “cmw horizontal”.