To change the 'Account Admin', please click your profile icon from the bottom left and click 'Settings'.
Click 'Permissions' from the top right side and select the new admin of the account from the Drop down menu which says "Select New User".
Please note: You can transfer the ownership rights to a member who has the 'Manager' permission level in the "Humanity" account. If there is no employee at the Manager permission level, you will need to increase the permission level of one particular employee to the "Manager" before you can transfer the ownership rights of the account to that employee.
How to promote an employee to the 'Manager' permission level?
To promote an employee to the 'Manager' permission level, please click Staff -> Click the name of the employee you want to increase the permission level of -> Click 'Permissions' -> and under 'Account Type' -> select 'Manager' -> 'Save Changes'.