These methods apply whether you are running FirstClass in a single window or in multiple windows: To Do this go to the next level up from your current window Choose Collaborate > Navigation > Up One Level. go to any window that is in the path you took to the current window Control-click (Windows, Linux) the current window's title bar, or Command-click the title bar text (Mac), then choose the window. use the menu to go to a specific window Choose File > Open, then the object you want to open.