I know this thread has been open for a while (going on a year and a half now), and this might be obvious to some experienced users — but just in case, I wanted to share a workaround I’ve been using until this feature is officially added.
In Settings > Customize ChatGPT, under the field that asks “What traits should ChatGPT have?”, I added:
“After every response, add the current timestamp.”
Now each reply ends with a timestamp, which makes it much easier to track what was said and when, especially in ongoing conversations. Not a perfect solution, but it’s been working pretty well for me.