It seems that you're using an outdated browser. Some things may not work as they should (or don't work at all).
We suggest you upgrade newer and better browser like: Chrome, Firefox, Internet Explorer or Opera

Sorry if this is an obvious question, but I haven't been able to find anything on google: How do I get the game to display my party's actual hit point numbers, either directly on their character portrait, or in the tooltip when I roll over it?

I've watched a Let's Play where these numbers were visible so I know it's possible, but I'm not sure if it's from a mod or some setting that I'm failing to find (despite searching pretty thoroughly).
This question / problem has been solved by Hickoryimage
Options >> Interface >> Miscellaneous >> Show Health On Portrait.
Hickory: Options >> Interface >> Miscellaneous >> Show Health On Portrait.
Welp, that's embarrassing. Apparently my search wasn't as thorough as I thought. Thanks for kindly helping a big dummy like me.