When you first access the work order, this section will have no technician (None) assigned to the work order. In order to assign a technician to the work order, narrow down the technician you want to assign by typing the technician's name in the field (S) and selecting the technician from the drop-down list (this list includes all of your employees setup in the Employees module, for more information, see KB article).
Once you assign a technician to the work order, the technician's name (T), email address (U), and phone number (V) will replace the field (S). You can also send an email to the technician by clicking their email address (U), or call the technician by clicking on their phone number (V).
If you want to change which technician is assigned to the work order, click Change Technician (W), and this section will reset to the field (S). At this point, you will be able to select a new technician to assign to the work order.