We have released an important security update for Bold Builder on August 23, 2019 - please make sure that your Bold Builder installation is updated to the latest version - 2.3.2.
You can update Bold Builder by going to Plugins panel of your wp-admin and by checking the version number next to Bold Builder. If you are offered the option to update it, please do it.
If your version number is lower than 2.3.2 and you have no notification to update it, please download the latest version from https://wordpress.org/plugins/bold-page-builder/ and update the plugin manually.
If you need help in the process, please feel free to leave a ticket and we will assist you.
Is there an existing widget or some other existing functionality in bold themes to create a small 'extra info' pop up box upon mouseover?
If not, what would the recommended route be? jscript? css?
Unfortunately, the theme doesn't have that functionality. What you can do is try some third party plugins for that purpose.
You could try some of the plugins from this article:
8 Top WordPress Popup Plugins and Why You Should Try Them
Please note that we haven't tested any of these plugins with our theme, so we can't recommend you a particular plugin nor guarantee it's compatibility with our theme.
Let us know if you need additional assistance.
Regards, BoldThemes team
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A huge thank you from BoldThemes in advance!