Go to 'GeneaNet > Online Family Tree > Privacy > Living Individuals > Living Individuals':

EN-hidden-individuals-01.jpg
Your 'Living Individuals' privacy option must have been set to 'Semi-Public' or 'Private':

EN-hidden-individuals-01.jpg

Select the 'Hidden Individuals' tab then click 'Add an individual':

EN-hidden-individuals-01.jpg

Enter the first letters of the surname/first name of the individual to hide then click the 'Add' button at the bottom of the list:

EN-hidden-individuals-01.jpg

The new hidden individual is now listed as first_name.n.surname where n is a unique number to identify individuals with the same full name.

You can remove an individual from the list at any time by clicking the 'Delete' button.

EN-hidden-individuals-01.jpg

Select the 'Advanced Options' tab to change the number of years that define if individuals in your family tree are said to be alive or not.

EN-hidden-individuals-01.jpg