MS4 Piano Roll Editor should have an option for showing multiple staves simultaneously

I hope that when Piano Roll Editor will reappear in MS4, it will have a possibility to show simultaneously multiple staves. Ideally user would be able to choose which staves to show or hide. If not then at least Piano Roll Editor should be able to show simultaneously all the staves of a single instrument. For instance both the upper and lower staff for piano or all three staves for organ.

Best regards