Can I customise the layout of pdf documents with this extension?

Absolutely! It is possible to configure several different layout variations from the backend settings (logo placement, margins, integrated labels etc).

Further layout  customisations  can be achieved by theming the  frontend  and base *.phtml files that come with Pdf Customiser. Most elements of the pdf document can be adjusted through the template files. Basic  html /Magento 2 theming knowledge is required. See the related FAQ below details.