Regretfully this isn’t a feature offered by the theme. It could be possible with custom development, but this would be outside the scope of support we can offer. If you want to make custom changes to the theme that requires theme modification, behaviour changes or 3rd party plugin integration, we suggest that you contact the author of “echoknowlegbase” plugin, or hire a developer to help you. Here are some good places to find a WordPress Freelancer: Envato Studio (https://studio.envato.com/), Codeable (https://codeable.io/), WPMU (https://premium.wpmudev.org/wordpress-development/)
Otherwise, if you need help about using theme features, bug reports & reasonable feature requests for future updates, please submit ticket here and we will happy to help you out.
In this case, please share us your site URL and the admin account of your site via private reply here so we can investigate your case and help you out. Also, please point to specific page where we can see the problem.