In the backoffice, click on : Modules and Services/Add a new module.
Once it's uploaded, the module appears down the screen,
install it, configure it,
you can come back to configuration screen anytime by looking up for the module in Modules and Services list.
You can save them in modules/multipagequestions/views/img
and name them with the id of the employee,
if Vincent has id_employee=3 his picture is 3.jpg
For picture size
they will be resized to 100px ,
it’s useless to save them in a bigger size.
However, if you want only one photo for all moderators, upload this picture by naming it ‘Default.jpg’ and delete 1.jpg, 2.jpg etc...