Invoice Numbering - Create custom invoice number formats with prefix, separators, year inclusion, and sequential numbering Secure External File Storage - Upload invoice attachments to cloud storage with time-limited expiring download links Hide Files Until Paid - Control file visibility on public invoices based on payment status Multi-Company Support - Manage multiple company profiles with distinct templates and branding Client Templates - Save invoice configurations as reusable templates for specific clients Company-Based Template Assignment - Automatically apply templates based on company assignment Portal Integration - Store and manage client templates from the Portal client detail page