1-Open two or more MIDI editors at the same time.
2-Mute multiple Notes at the same time.
3-Zooming into the Rack independently of Zooming into the Sequencer. One could Zoom into the Rack only not the sequencer also.
4-Open a Detached version of the Instrument or go into full screen mode on an instrument.
5-Right click pops up the tools in the editor window. No need to be pressing a key again and again to change tools.