When you draw note events in the MIDI editor, the note events assume the velocity value that is set in the Note Insert Velocity field on the toolbar. There are different methods to set the velocity.
Use the tool modifier for Edit Velocity that is specified in the Preferences dialog (Tool Modifiers page). The cursor changes into a speaker, and next to the note, a field with the Note Velocity slider shows the value. Move the mouse pointer up or down to adjust the value.
Value changes are applied to all selected notes.
Open the Note Insert Velocity pop-up menu, and select a velocity value.
On this menu, you can also select Setup and specify custom velocity values for the pop-up menu.
Double-click the Note Insert Velocity field on the toolbar, and enter a velocity value.
Assign key commands to Insert Velocity 1-5, and use them.
This allows you to quickly switch between different velocity values when you enter note events.