Just to make sure we all understand each other, I am assuming you mean you have a score for several instruments, and you want to have separate parts for each instrument display in its own tab. I'm not sure if you are aware of this, but MuseScore *already* supports extracting parts into their own tabs - see File / Parts and Part extraction
in the Handbook. But 2.0 will improve on this by linking the part and score so changes to one automatically update the other.
Comments
Already done in the upcoming Musecore 2
Just to make sure we all understand each other, I am assuming you mean you have a score for several instruments, and you want to have separate parts for each instrument display in its own tab. I'm not sure if you are aware of this, but MuseScore *already* supports extracting parts into their own tabs - see File / Parts and Part extraction in the Handbook. But 2.0 will improve on this by linking the part and score so changes to one automatically update the other.