By clicking once on any item, you select it, and a gray border appears around it. This represents you - in the user list your name is displayed in bold, and in the room list the room you are currently in is displayed in bold. In each list is a bolded item above a filled gray bar. As you move your mouse over the room list, the bottom status bar displays the topic of the room the mouse is over. Above the each part is a small status bar - the upper bar tells you how many people are in a particular room and what the name of the room is, and the bottom bar tells you how many rooms are on the server. The panel has two parts: the upper part which displays a list of the people in a particular room, and the bottom part, which displays a list of the rooms currently on the server and the number of people in each room.

These buttons are toggles that allow you to attach and detach the control panel to the left and right of the main chat screen. You may see two small buttons appear at the lower left and right of the chat window. If you do not see the control panel, you can display it by selecting the 'People/Rooms' button at the bottom of the chat window or by selecting from the 'People/Rooms' submenu from the 'Panels' menu. Using this panel you can perform a number of common actions easily. The control panel is a small panel that displays the people and rooms that are on the server you're connected to.

Ewgie Documentation: Using the Control Panel EWGIE

Eso move chat window