Hello,

There is the command accessible through right mouse click 'Open in New Window'. Unfortunately, it is not present in the Customize/Commands/All Commands list, so I'm not able to create a shortcut icon for it.

Therefore I decided to create a workaround and wrote this absolutely basic macro (module in catvba library):
Sub CATmain()
CATIA.StartCommand "Open in New Window"
End Sub

It works fine when I run it through Tools/Macro/Macros menu. But when I create a shortcut which is supposed to run this macro via some toolbar, it freezes my Catia by somehow entering an infinite loop instead of opening the selected part/parts in new window. Did anyone had similar problem or can try to replicate this issue? Any ideas how to mitigate it? I've verified the same behavior in Catia v5-6 R2020, R2019, R2018 and R2016. What is even more strange, this macro was working perfectly fine until recently, I would say around month ago, when it started looping infinitely without any apparent reason...