Each menu item and corresponding window can be activated many times, thus each time you have independently working copy of window and the independent copy of data within it. This feature of the system is very useful for simultaneous work with several bookings. (You would have to launch several copies of CHUI terminals for that). Only thing you must remember, that when you open new window, all other windows are minimizing to the Windows Taskbar. They subsequently can be recalled to the screen thereafter. It's also important, that when you are working with any dialog window, you are unable to switch to another window until you close dialog. Please note! It is not recommended to open the same booking in several windows, because you can be pained with changes made by you in all these booking screens.