1. There is no upgrade path to Logic Pro anymore - you just get Logic 9 from the App Store (hence its lower price)
2. Do a 'select all' and hold down Option-Shift while dragging one of the notes with the Velocity tool to make all notes in a region the same velocity - likewise to adjust note lengths.
Thanks a lot Sir,mostly I edited in the LIST. I red in the manual what you told me,and it did not function for the good reason that " I FORGOT " to use the velocity tool,jeje .
In anyway, You helped me a lot !