To start logging the current room's activities, you select "Log" in the right button context menu over the chat area.   You can un-select it to stop Logging this room.


Another possibility is to save the whole chat using the "Save Log" function in the chat's Actions menu. 


Please note not all rooms can be logged--room admins may decide they do not want to allow logging, in which case you will be unable to save the content.


The system will remember your choice for that particular room and will attempt to Log it every time you enter if you have logging selected.


If a room is saved in your favorites, you will be able to control Logging from the favorites manager.