Short answer: you don’t.

First, a LIVE SET is just a list of Performances in the order you wish to recall them.
If you wish to EQ all the sound from the MODX, you would be best to do this at your sound system. The “Master EQ” is a 5-band Parametric with peak/shelving option at the outer bands. Each Performance has its own Master EQ.

Therefore, if your goal is to apply EQ to the entire MODX, it will need to be done post the Main L&R Output.
In live sound situations a small format mixer can be used — in place of a DI Box, small format mixers offer EQ plus option to provide both unbalanced outs for on stage monitors and balanced outs to feed Front-Of-House.

Extra Credit:
The shape a Performance takes is really up to the programmer. It can be from one to sixteen Parts; it can contain from one to scores and scores of Oscillators; A Performance can be used for real time play, or sequence playback or both simultaneously. The Master EQ is the final block within each Performance. It is not a separate device that all Performances pass through.

Thanks for your response - ok then maybe you can help me with this - let's say - I set the EQ on a patch/performance in Live Set - then I switch to a new patch - the setting in the EQ have all changed - switch back to the original patch - they've changed again - and not back to where I had set them 15 seconds earlier. What causes the EQ setting to be retained or do you have to change them every time you pick a new patch.

EQ isn't trained, it's set. Each Performance carries its own settings. If you want them the same you need to program them the same.

The way you describe your expectations is that there would be a global EQ that does NOT belong to a Performance and instead should be global for all Performances. Set it once, change Performances and the EQ settings don't change. But that's not how it works. Every single Performance carries its own EQ and there is no global EQ.

If you change venues and your EQ doesn't suit, either adjust every Performance manually or do the easier suggested adjustment: carry an EQ external to MODX and adjust it.

I think the choice not to have a global EQ was thinking if you needed adjustments venue-to-venue, you'd have a FOH mixing board run by someone who would adjust EQ rather than the keyboardist.

Ok thank you but that didn't really answer my question. My problem is - I set an EQ for a performance - then next song I go to another performance choice - the next song I go back to the original performance choice - but the EQ settings were not retained. Basically, I'm having to re-set the EQ every time I choose another performance. My query - is how do I lock in an EQ setting for an individual performance - do you just store -enter- yes? Will that keep the EQ setting for the individual performance. It doesn't seem to in mine but maybe I'm just screwing it up. It's hard changing EQ with your left hand and playing your part with your right hand. (and that's where I've been doing it)

If a LIVE SET is involved, then it is possible that you have not updated your Live Set. This could explain why the EQ you made is not recalled.
The Live Set is just a “list” — a play order for Performances.

When you edit the Master EQ you are not editing the Live Set, you are actually editing the Performance. The Master EQ is apart of the source Performance. When you edit and then press [STORE] you can either create a New Performance or overwrite an existing Performance.

If you select “Store as New Performance” the Master EQ will be represented in that new Performance... but not your Live Set. You haven’t associated a new Performance with your Live Set.
If you select “Overwrite Current Performance” the Master EQ will be in that Performance... and it will update your Live Set - because this is the Performance you LiveSet is referencing.

_ The New Performance is not linked to any Live Set... you must do so, replacing the previous
_ If you started from your Live Set, pressed HOME, and edited the current Performance (the one linked to the Live Set), overwriting it will automatically update your Live Set... because it is referencing that HOME location.

The third possibility is you did not [STORE] your edited Master EQ to the Performance. This would account for you having to do it it each time.
The fourth possibility is you are dealing with a Library Live Set... Library = ROM or Read Only Memory.
A Library is full of published editions... if you want to update a Library Live Set you must create an entirely new edition (Library)

Best Practices for onstage EQ
I don’t want to be captain obvious here, but “the best” way to ensure good sound “out front” is to have a trusted sound person. It must be stated because every other solution is a compromise. You cannot tell what you sound like “out front” unless you are sitting out front. You cannot effectively EQ yourself from your position onstage. In a situation where your sound system must serve both you and the audience, there is bound to be compromise. (Frankly, they have better seats for listening).

High frequency content is highly directional, if you cannot see the tweeter, you cannot *hear* the tweeter. You are hearing only reflected (late) high frequency content. You will tend to over compensate if you are sitting off-axis. Low frequency data tends to be omni-directional and difficult to judge, as the farther away you are the more bass you hear (to a point).

Like being off-axis on a microphone, if you are not in the “sweet spot”, the sound immediately suffers
If *you* are seated off-axis to the speakers that are feeding the audience... you’re in the second worst place to be (the only one worse is directly behind a speaker, completely off-axis).

A speaker is the opposite of a microphone; they share properties. They are both transducers — they both convert one kind of energy to another.
A microphone takes air molecules in motion and converts them to electrons.
A speaker takes electrons and puts air molecules in motion.

When you are off-axis to a mic the sound suffers, you cannot fix it with EQ
When you are off-axis of the speaker the sound suffers, you cannot (should not) fix it with EQ... because you are compensating for your position. You are in a poor place to really hear what it actually sounds like out front.

What you can do:
Record yourself to the MODX Performance Recorder
EQ the playback while sitting in your onstage position, make it sound exactly right for you sitting where you are... then go out front and sit in the audience. The difference in perspective whether slight or dramatic will let you experience the reality of sound, frequency and perspective. You can begin to make adjustments...

While it is natural to want to adjust it for yourself where you sit, but if you were in the best seats in the house (out front) your perspective will be different.