I'm currently struggling with a minor previewing issue. I'm working on a multiplayer based game for a while now.
This basically means that I have to open 2 preview windows each time, when I want to test out the new things that I've added.
C2 unfortunately, as far as I know doesn't offer a shortcut icon or specific option to open another preview window, while maintaining the existing one.
However, I've found a workaround by using the browser plugin to open a new localhost window which works on almost all browser except NWjs.
Since I'm aiming to release the game using NW.js as the endproduct, I would also like to be able to preview with the endproduct.
I'm not 100% sure if this is a bug by NWjs or the way that C2 handles previews with NWjs but the bug is basically that the second window opened with the browser plugin, totally bugs out on my end and flickers in black and white all the time. (On start of layout > Open new window [param = "localhost URL"])
To sum it up, an additional icon or shortcut (key + click on preview) to open a new preview window while maintaining the existing one would be amazing!