Thank you for providing this additional information. I’m not exactly sure how to go about this, but I will see if one of our other team members can assist. If you haven’t seen it already, our theming guide may provide some guidance: PKP Theming Guide
I see that you are discussing this issue here: Add crossmark button in HTML pages - #5 by rebas_saber - one of our staff members is corresponding with you on this, so please be patient in expecting a response. Support on the PKP Community Forum is provided for free by PKP staff and community members. We are a small team and need to balance our time spent answering questions here on the Forum with our other work developing and maintaining our free and open source software and other services. We try our best but do not guarantee that every question will be answered or that every issue is resolved.
In the future, please do not post duplicate posts. Please see our FAQ (under “Keep it Tidy”) here: https://forum.pkp.sfu.ca/faq