Since I'm in the business of learning - there are 2 ways you can learn this tip #1 - Read the step by steps with screenshots or #2 - watch the video (or #3 - both 😊)
The Chat Details Pane is new as of October 2024. It's one of the more useful new features, honestly. If you've been using Teams a while, some of your chats, like mine are REALLY REALLY long. Also, the nature of a chat is there are lots of short replies. When you need to find something, it can be frustrating...and take a LOOONNNGGG time to scroll and find files or pinned messages.
The Chat Details Pane is a small little icon in the upper right hand corner of your chat window.
Click on it...and ta-da...the Chat Details Pane shows up on the right side of your screen. It's a toggle so you can toggle it on and off as needed.
What's in the Chat Details Pane