MIDI : Score Editor : Edit Tools : Pencil

Pencil
Use the Pencil tools to insert, select, move, or delete notes in the Score Editor window. The various Pencil tools differ in how they draw note durations, repeated notes, and velocities, but function in the same fashion as drawing notes on tracks in Notes view in the Edit window or in a MIDI Editor window.
To select a Pencil tool:
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Press the F10 key to select the current Pencil tool. Press the F10 key repeatedly to cycle through the different Pencil tools.
The following Pencil tools are available in the Score Editor:
Free Hand
The Free Hand Pencil tool lets you draw single notes of varying duration.
Note velocities are determined by the Default Note Velocity setting (see Default Note On Velocity).
The minimum duration of the note is determined by the selected Default Note Duration (see Default Note Duration).
Line
The Line Pencil tool lets you draw multiple notes of the same pitch and duration.
Note velocities are determined by the Default Note Velocity setting (see Default Note On Velocity).
The duration is determined by the selected Default Note Duration (see Default Note Duration).
The start time for each note is determined by the selected Grid value (see Grid).
Triangle
The Triangle Pencil tool lets you draw a series of MIDI notes on a single pitch whose velocities oscillate between the defined Default Note Velocity and 127 in a triangle pattern. The duration of each note is determined by the current Grid value.
The duration is determined by the selected Default Note Duration (see Default Note Duration).
The start time for each note is determined by the selected Grid value (see Grid).
Square
The Square Pencil tool lets you draw a series of MIDI notes on a single pitch whose velocities alternate between the defined Default Note Velocity and 127 in a square pattern. The duration of each note is determined by the current Grid value.
The duration is determined by the selected Default Note Duration (see Default Note Duration).
The start time for each note is determined by the selected Grid value (see Grid).
Random
The Square Pencil tool lets you draw a series of MIDI notes on a single pitch whose velocities change randomly within the range between the defined Default Note Velocity and 127 in a square pattern. The duration of each note is determined by the current Grid value.
The duration is determined by the selected Default Note Duration (see Default Note Duration).
The start time for each note is determined by the selected Grid value (see Grid).