To manually create a new site, firstly the organisational unit which the site is to be created under should be selected. In this example 'Portfolio' is the organisational unit. In order to edit an organisational unit, the admin tab should be selected. It is also possible to create a new organisational unit in this tab. This is achieved by selecting 'Create New Org Unit'. To create a site, 'Create New Building' should be selected within the org unit.
To add a sub-site, the existing, or in this case, newly created site should be chosen and then, 'Create New Building' selected. This will enable a sub-site, e.g. a floor or an external unit to be created and linked to the main site.