The new temporary read permission functionality is an extention to the existing Send to a friend function. It allows facts to be sent to non-registered users.

When in folder`s list view, there is the button "sent to friend" at the bottom of the facts` list. To activate it you should select one or more facts by checking the checkbox at the end of the corresponing lines in the list.

When you click the button, the extended Send to a friend interface will open.