Make Custom Field (Not Stored) Visible on Form
For a non-stored value field based off a formula it should be available in both saved search and in the UI. Check out “Creating Formula Fields” SuiteAnswer Id: 10081 for more info.
For a non-stored value field based off a saved search it WILL be available in the UI, but will NOT be available in search. Check out “Creating Custom Fields with Values Derived from Summary Search Results”
SuiteAnswer Id: 31727 for more info.
Hope that helps!