Feature Request: Drop the canvas with holding "space" key

I am not sure how other Xmind users move their mindmap canvas. For me, it is not convenient to move horizontally. (Vertically, that's okay. I can use my mouse wheel.) Every time, I need to move my mouse out of the notes and drop the horizontal scroll bar right on the bottom of the screen. How about referring to many applications' practices? Just simply holding the "space" key and drop with the mouse? Appreciate it.