A special toggle controls whether invoices must use their assigned company's template: "Always use company default template (if set)" When Enabled: Invoices assigned to a company will ALWAYS render using that company's template The manual template selector in the invoice builder is disabled/locked Only the company's default template can be used If company has no template set, the global default is used When Disabled: Invoices can override the company template with a manual selection If no manual selection is made, the company's default template is suggested Full flexibility in template choice per invoice