From Business Central

If the payment authorization preference is set the option “From Business Central” the authorized user for signing must access the payment page.

In this page the signing process can be activated from the factbox.
The advantage of this page is the possibility for the user to navigate to the related posted purchase invoices when there is need for detail information.

*If you want to see the detail of the payment just drilldown on the line and you can see the related documents and links to the posted purchase invoice.