The Quest Journal window is used to display information about pending quests.
The window will appear when you click on the button labeled "Journal" in the Main Menu or Command windows of the User Interface. In addition you can type the command "/journal" to activate the window.
There is nothing shown when the window is concealed. The window is invisible with no graphics or controls to minimize the amount of memory used. Nothing will appear on the screen when you attempt to activate the window.