Total Editor (F3 View / F4 Edit Tool for Total Commander)

[Conan]

This:
https://en.wikipedia.org/wiki/Windows_Photo_Viewer

[Pawel]

Yes. This one...
I checked it. It will not work in Total Editor as my program automatically adds quotation mark, if missing in path - it seems PhotoViewer running with rundll32 not accept it.

This will work (remember to not use quotation mark for image file)
rundll32.exe "C:\Program Files\Windows Photo Viewer\PhotoViewer.dll" ImageView_Fullscreen Full_Path_To_File.jpg

I could add an option to not using quotation marks I guess...