At the Employee tab i.e. Corinne Brincat you select the 'Mentor check box' and then 'Save'. You can continue to select the next employee to add as Mentor from the same tab
P.S. Important
You have to activate the appropriate setting in order the list of employees, you have assigned as Mentors, to become available .
ADMINISTRATION > Institute Administration > Customization Wizard > Application Settings > Classter Web Portal > Enable Employees Choice as Mentor
