Measures numeration

Setting individual properties on things like measure numbers, or system brackets or instrument names, is never a good idea, because these things are generated on the fly each time the layout changes. That number in measure 5 won't be there if the layout changes to make measure 5 no longer start a system; instead there will be a measure number on some other measure. When you switch to Continuous View, there is no more system starting with measure 5, so that measure number you took the time to hide is now simply deleted as no longer needed. if you later return to Page View and it just so hapens that measure 5 starts a new system, then a new measure number will be generated - and a new bracket and isntrument name if appropriate. The old one is gone, and with it, any properties you tried to assign to it.