So, a lot of people keep asking about this or messing things up, so time for a simple guide.
Main chat windowHere you'll see the main chat window. There are 6 different buttons.
1. A button to enable/disable your chat input box.
2. Chat option select. Use this to enable or disable certain messages in your chat box (see below).
3. With this button, you can detach the selected tab from the chat window. This way you can drag it around where you like.
4. With this button, you can add a new tab (see below).
5. With this button, you can remove a certain tab from your chat window.
6. This button allows you to lock your current tabs. That way you can't accidentally move them around.
Creating a new tabNow, if you want to create a new tab, click the "+" icon. As you see, a new tab will be created.
Creating a new tabNow you want to give it a name. Just make sure the tab is selected, then doubleclick on the name.
Renaming your new tabNow just type a new name and press Enter.
Setting chat optionsTo decide on what you want to show in the new tab, click on the small circle icon (the second icon). A new window will open with various options. As you see, all of them will be set to OFF (unless you already enabled some).
Setting chat options #2To enable a certain option, just click a certain option in the list and the OFF will turn into an ON. You can also click the "all on" option and it will enable all options.

So yeah, I hope this clears up some confusion. Lemme know if you have any further questions.