On pages where you can enroll multiple users in a user group or a knowledge path, or enroll a user in multiple knowledge paths or user groups, check boxes appear to the left of the items in the list. You can select the items manually by clicking the boxes. However, above the list, there are Select options which enable you make multiple selections easily. With these options, you can select All of the items, None of the items, the items which are already Enrolled, or the items which are already Unenrolled.
To select items: