The Window Menu

Window->Close (Ctrl+W)

Close the active window.

Window->Close All

Close all opened windows.

Window->MDI Mode->Childframe Mode

Switch to Childframe user interface mode.

Window->MDI Mode->IDEAl Mode

Switch to IDEAl user interface mode.

Window->Next Window (Alt+Right)

Switch to the next window.

Window->Previous Window (Alt+Left)

Switch to the previous window.

The last items in this menu show the currently opened window names.