How to modify PDF file generated through reports?

Hello, when I generate report for my website on PIWIK dashboard it gives me PDF file but the layout seems to be distorted, logo looks bad (low quality) and it gives me each chart in different page instead of fitting information to the couple of pages. How can I fix that?

PDF reports might not look perfect. But it would take much time to improve them to look perfect in any case.
Feel free to create issues for improvements on github (Issues · matomo-org/piwik · GitHub)
Or if you have enough coding skills, feel free to fix it on your own and create a pull request for it.