Glissando lines: Start/end points can cross staffs!
Nightly d45cc19 / Win 7.
The start/end handles of glissandos can cross over from pitched staff to TAB in the same grand staff system (by clicking on start/end handle and using shift + up/down arrow). e.g:
There needs to be an upper/lower limit to keep the glissando in the same staff – at least for staff/TAB pairs
Comments
If it actually works, though, I think it is important *not* to disable it - this could very well be desired for piano music. I guess we could make a special exception for staves of different types, but I don't really see value in preventing it. If you don't want a glissando to extend across staves, no one is forcing you to do it.
Glissandi are explicitly and on purpose allowed to connect different staves belonging to the same instrument, piano being the commonest example (but not to cross instrument, either vertically or horizontally). Of course, in the OP case, both staves belong to the same instrument.
And yes, it would be possible to prevent going from a staff of one type to a staff of another type. But, I believe than a stronger reason is needed than simply: "the result cannot be performed". MuseScore allows to write down a lot of things which cannot be performed and some which even make little sense. If you don't need them, do not use them!
In fact, it is debatable that the very OP example make sense: having a 2-staff instrument (a sort of piano? organ?) where one staff is standard and the other is tab; how is such a music supposed to be performed?