Controller Type Select:
Selects what type of data you can edit.  The menu displays some commonly 
used parameters and then expands to show all available controllers.  Items 
for which data already exists in the track are checked off.  Note velocities 
and the tempo of the song can also be edited here.

                   ********

Eraser: 
Click and drag to delete controller data.  Note velocities can only be 
deleted by deleting the corresponding notes.

                   ********

Pencil: 
Draw in data free hand.  

                   ********

Arrow: 
Select a range of data for clipboard operations 

                   ********

Line: 
This tool lets you draw a straight line.  Click at the starting position 
and drag the line to where you want it to end before releasing.

                   ********

Curve:
Works similar to the Line Mode but after releasing the mouse when drawing 
a line, moving the mouse will change the shape of the curve until you 
click and release again.

                   ********

Fill Rate:
Specifies how dense the inserted MIDI data should be.  Too many values 
can mess up the timing of your song and doesn't provide any discernable 
difference in playback. 

                   ********

Controller Value and Insert Point:
These status displays show you the precise position of your mouse.  If you
are trying to add very accurate points, you can drag the border between the
piano roll and controller panes to change the scale of the window.

                   ********

Draw Lines: 
Displays each discrete value as a line.

                   ********

Draw Blocks: 
Fills in the time after the event with a block of color.  This is 
particularly useful when you have somewhat sparse controller changes as you
can still see the data in effect while the original message is scrolled out
of sight.

_____________________________________________________________________________