Apologies for the delay in coming back to you.
Firstly, I’ve removed the link above as I now have a copy.
Secondly, looking at the document you’ve uploaded, adding an o/no. column isn’t going to be possible, but you can add one in the header box. Although, this would be for the whole invoice rather than an individual line.
Adding a delivery note number isn’t going to possible either I’m afraid, but you could add these details as a comment line and use it as a work around.
Because of the layout of the issue date etc (it’s generated as a table with each line as a new row rather than column), I don’t think it’s going to be possible to put the details in a horizontal format as you have done in the sample you uploaded.
I should however be able to make the logo bigger for you if you wish, and add your company details (including bank details) into the footer of the invoice.