Hi @Jose_Ares,
Your best bet for intervening within Smarty-based content may be a Smarty filter. See e.g. this thread: How to create a plugin to change a button behavior - #2 by asmecher
It can be a little clumsy but as far as I know it’s the only way of extending content within a Smarty template, unless there’s a fortuitously-placed hook already in the template you want to modify.
You can look e.g. at the ORCID profile plugin (GitHub - pkp/orcidProfile: A plugin to pull ORCID information into a PKP user profile) for some code that does this. Make sure you’re looking at the branch matching your version of OJS – the conventions are different depending on whether you’re using a Smarty2 vs. Smarty3-based version of OJS.
Regards,
Alec Smecher
Public Knowledge Project Team