Musescore 3 in 2 screens

In Musescore 3 there is no possibility to work in 2 monitors, a portable edition does not exist and copy + paste from Musescore 2 doesn't work. Is there any workaround to copy from a full screen score to another one? Splitting the screen is not useful at all if you must deal with big scores, like those for ensembles.

Thanks in advance.