[wodow]

By George, ItsMattyG is right! After editing a question (with the "stylus"/pen icon), the revision number counter that appears (e.g. "1 / 2") has arrows next to it that allow forward and backward navigation through the new branches.

This was surprisingly undiscoverable. I wonder if it's documented. I couldn't find anything from a quick look at help.openai.com .

[toomuchtodo]

Careful what you trust with help.openai.com. You used to be able to share conversations, now it's login walled when you share, and the docs don't reflect this (if someone can recommend a frontend that has this functionality, for quick sharing of conversations with others via a link, taking recommendations, thank you in advance).