I played in a song, fixed velocity. The notes are all 120. Without editing every event for each note, is thee an easier way to put in 127 and copying that to all notes.

I have tried putting in a 127 Event, but it is still not as load as when I change each note to 127 on top of putting in a 127 Velocity Event.

Edit - Replace
or Edit - Change Velocities.

You'll be surprised what you can do if you check the box for Data Filter.
Highlight the desired section first..