In the right section of the procedure window you will see invoice info.
Invoice
You will see invoice type, invoice date, voucher date, due date, invoice amount, VAT amount and currency, purchase order number, authorized signer and supplier invoice number.
Authorization Info
Under Authorization info you will see the user name of the signer(s) that shall authorize and has (have) authorized the invoice. The current signer is marked with a green mark. You can also see the suggested action to be taken by the signer and which actions the previous signers have taken, e.g. if the invoice has been forwarded or has not been authorized.
Log
Under Log you will see the date and time of the different actions that have been taken for the invoice.