To download the PDF of any invoice from your Banqup, go to the invoice's details (by clicking on the invoice).
In the details' page, right up top the preview of the invoice, click on Download.
You can also open the PDF in a new tab by clicking the View in full screen button.
If comments or attachments were added to the invoice, you can choose to download the original document or to download the document with the comments or attachments.
