Yes. There is a Control Change command that determines the amount of Reverb Send. Control Changes are "Channel" messages that can change settings, like volume, pan position, modulation, sustain, etc., etc., among them is Reverb Send.

It would be different for Pattern mode

PATTERN mode
At the beginning of *each* SECTION you can insert a REVERB SEND amount value.
From the PATTERN mode
Select the track in question
Press [EDIT]
Press [F5] INSERT
Set the EVENT TYPE = Control Change
Set the cc value to 91
cc091 is Reverb Send
You can input the amount of reverb, 0 = none, 127 = maximum.

You must place a Send amount value for *each* Section because in MIDI, the last value for a controller remains. Like a volume change... Once you set the level or Send amount it remains at this value until you reset it.

SONG mode
In SONG mode the structure is linear, so although the steps for inputting the cc091 Event is exactly the same, you can additionally, automate the Send amount value in a SONG SCENE. There are 5 Scenes, each can memorize a specific value for the Send amount so that when the Scene event is recalled, either by touching the [SF1]-[SF5] button or by inserting a recall event on the dedicated Scene Track, a precise value of your controller values can be recalled.

Exactly what I needed.....Thank you Phil !!!

Can I do the same thing to add different volumes per track / per section? Is CC# for each part volume 007 ?

Now if I want to add a gradual increase or decrease in volume within a pattern section / track, can do it through PATTERN > JOB > Event (continuous data) or PATTERN > JOB > Note (crescendo). Any rules / tips how to decide which one to use.

Finally, when I have added all my events / control changes, Can I see them all in one place? Will PATTERN > EDIT show me everything (all events) including continuous data / crescendo events?

Can I do the same thing to add different volumes per track / per section? Is CC# for each part volume 007 ?

Now if I want to add a gradual increase or decrease in volume within a pattern section / track, can do it through PATTERN > JOB > Event (continuous data) or PATTERN > JOB > Note (crescendo). Any rules / tips how to decide which one to use.

You will want to use cc011 Expression. Expression is volume but remains within the Channel Volume setting. Channel Volume is cc007.

The difference is an important one to understand. The MAIN volume for the PART is controlled by cc007. If set to 96 on a particular MIDI channel - nothing will ever be able to exceed that maximum. You use cc011 Expression to work within that maximum setting. Say you are playing along with a sequence using a B3 organ sound, and you determine that to play in this setting you never want to make the organ louder than 112. At 112 that volume is where you want your crescendo to maximize. You would set cc007 (PART VOLUME) = 112. Then you can use the FC1 pedal which defaults to cc011 Expression. This make toe down = 112 and heel down = 0. So even when you maximize the FC you never exceed that maximum value of 112,

So think of cc011 Expression as your performing Volume, while cc007 is the channel's Main Volume. Make sense?

Finally, when I have added all my events / control changes, Can I see them all in one place? Will PATTERN > EDIT show me everything (all events) including continuous data / crescendo events?

Your Sequencer even has a MIDI View Filter that lets you look at just specific types of data. When you press EDIT from the main PATTERN screen, you will see it as one of the Function button options. You can temporarily filter certain events from view - so you can isolate just cc messages or just a particular cc message. (Later remember to restore it so you can view all items).

But let us explain one thing about the musical term "crescendo" and synthesizers.

Crescendo is basically a gradual increase; specifically, a gradual increase in volume of a musical passage. But this can be different for different instruments. In order for a percussion instrument to crescendo it requires multiple strikes (percussion instruments are hammered, struck or plucked), while an instrument that is bowed or blown can crescendo while holding a single note.

Crescendos and decrescendos in music occur one way and on recordings of music occur in an entirely different way. Take a Fade Out (we've all heard songs that fade out at the end) _ the band is not necessarily playing softer, the engineer is simply turning down the overall mix. It does not even sound like they are going off in the distance, unless there is a slow increase in reverb as the signal dies out. It's not natural but we except this convention because it is used so much.

So fading out and fading in (or up, in the case of a crescendo) is not always natural. But just be aware of what effect you are going after. Changing how loud something is can have repercussions (no pun intended).

So depending on the sound you are performing you may approach this is different ways. If it is a held string pad chord, you can create a crescendo by manipulating the cc011 Expression level - by creating a series of MIDI Control Change events . If however, the instrument is a piano or drums or other percussive type instrument, you may need to create your crescendo using velocity and/or a change in performing volume.

But when you think about it, increasing velocity does nothing, at all, for the held chord.
And if you are not careful, changing velocity on some sounds can cause unwanted changes to the performance.

Not to overly complicate it, but I've been here: If you are changing level of percussive instruments with MIDI data be aware that changing velocity is different from changing volume. Yes, there is a similarity in result but there is a very important difference. Say your goal is to have the rhythm section get louder over a few measures, raising the volume using cc011 will make each sound louder, where changing the velocity might radically change the performance. When you adjust velocity you may change the WAVEFORM that is accessed - for example, the snare drum or hihats might be a 5-way velocity swap, or the bass may switch to a slap articulation when you change the velocity, etc.

So increasing the volume with a cc and increasing the volume via velocity can have very different results.

The sequencer allows you to MODIFY VELOCITY and to CRESCENDO - These two [F2] NOTE JOBs work with note-on Velocity... (not good for held chords) on for retriggering articulations each increasing as you go...

CREATE CONTINUOUS DATA is found under [F3] EVENT - this JOB allows you to create any continuous control data using sophisticated curves.

The suggestion - is to create the data, audition it, if you don't like it, you can press [F1] UNDO] to undo the most recent edit. You can actually A/B using UNDO/REDO (but it is like the Omega 13, you only get to undo the one most recent edit)

when you finally get something you like, STORE it.

Let me ask if I understand a few relationships between volume controls. Can CC 007 events be added by section. Or is CC 007 by design, one level / one setting for each part - same level across all sections? Can I look at CC 007 almost like a tracker header for volume??? Finally, what is the relationship between CC 007 controller setting and a particular part's volume /output level that I set in my pattern mix? Is mix volume the same as CC 007 channel volume or am I mixing apples and oranges? Do I need to input a CC 007 event first, before I can create crescendos using CC 011 Expression controller?