You can adjust the velocity by switching into Sequencer Overlay mode. Press the Tab key and you will see gray lines that relate to the Velocity and Duration of entered notes. You can use the Velocity Overdub function in Notion to record the velocities into the score from your MIDI keyboard. That is this button:

- Velocity Overdub.png (6.9 KiB) Viewed 13539 times
Once you press this button, begin to play the rhythms of the notes that are entered. Each key strike will represent a velocity that will be recorded into the score.
You can also set these manually, or edit the velocities that you have recorded, by selecting the notes that you want to effect, and then using Option(Alt PC) + Up/Down Arrow keys to adjust the velocities by increments of ten, or by pressing Shift + Option (Alt PC) + Up/Down Arrow keys to adjust by incrememts of 1.
You will also notice that the colors of the gray bars will change in relation to the set velocities.
-Admin