GiD - The personal pre and post processor
Multiple windows
Menu: View->Multiple windows...
The Multiple windows command lets you have several views of the same project. Different views can be displayed inside the program main window or in supplementary windows.
‘Link views’ is a checkbutton that set that the views to be synchronized to show all the same viewpoint
Now postprocess allow set different style for each view, but the current result, if any is common to all