System Wide settings can be edited in the Settings tab.
Default Email Addresses for Quotes, Invoices and Purchase Orders
By default emails are sent using the email address of the current user. If you require emails to be sent from a shared address you can enter the relevant address in this section. The address you enter here will then be the default in the email dialogs. The user can still override this if required within that dialog.
Default Account Manager
Set the default Account Manager for newly created companies by selecting them from the list.
Default Payment Terms
Set the default Payment Terms for newly created companies by selecting from the list.