The Ismember and Nonmember mergecodes can be used to display content only for members or only for nonmembers.
There is a Blue WishList Member button that appears in the Page/Post editor which allows you to insert the desired Mergecode or Shortcode.
Here is an example of how the codes will appear in the admin section of a page/post once they are created and inserted. Note that the codes will display the corresponding information on the live site.
[wlm_ismember] your text goes here [/wlm_ismember] to display text for members only.
[wlm_nonmember] your text goes here [/wlm_nonmember] to display text for non-members only.