The options discussed on this page are found by selecting Menu --> Setup --> Staff  

Staff Groups can be created so that Staff Tasks can be assigned to multiple staff members at one time, and it is also a very useful feature in FLEX Messaging. For example, you may want to assign a task to all the receptionists at the practice, or even group one set of practice staff together if you use FLEX at multiple branches. This can be done in the Groups section of the Staff/Roles setup.

First, you can create a group in the Staff Groups box by clicking on the next empty line twice and then typing in the name of the group. Then, drag the required staff members from the Staff box to the Group Members box. Tip: Hold down the CTRL key to select multiple staff.

Once you have created a Staff Group, it will be available to use when creating Staff Tasks and Messaging.