To view the invoice details,
On the left main menu, click on Payments > Invoices
2. Click on the -> Arrow in front of the invoice you would like to look at in detail.
3. In the Invoice view, there are customer details, invoice details, the option to add additional email ids, a personal note, edit terms & conditions, and invoice summary.
Note. By clicking on "Send Invoice" on the right actions menu, the invoice will be sent immediately (with any changes, if made on this page)