This is how you configure Shortcodes module: This module will enable the shortcode builder to be visable on the visual editor.

Step 1:

On your wordpress backend go to:
WishList Plugins -> WLM For Infusionsoft

Step 2:
Make sure the module is active then click on settings

Step 3:
This is where you can set which fields appear in the shortcodes editor. (Only needed if you have too many custom fields and need to be able to find them faster on the shortcode wizard)