How do I backread to the first prompt I sent in a conversation?

Hello. This has been my problem for a while now, I have veeeery long conversations with chatgpt because of research and other various reasons. I think just a few months or weeks ago, there was a bunch of horizontal stuff on the right side of your screen (I use laptop) then when u click it, it shows the prompts or things you said to chatgpt, and when u click one that u want, it jumps u way back there. Now i cant really find it, was it removed or there was a better feature? pls help me out!