Hi Steven - you sure can. I find it easier to think all of the sends as ‘busses’, that can be configured as needed - each bus can be sent to the main outputs or it’s own outputs, and these busses can easily be sent to the matrix as well.
You would:
- press the SEL button above the FX return fader
- who’s this SEL is lit, press the LR button (to the left of/under the screen) , which would remove the effects return from the L/R bus
- select the bus you want to assign the effects to.
- bring the FX return fader up to your preferred level
If you want that BUS to be sent to the LR bus, select the group, then press the SEL button above the SEL/mono fader (far right of the desk) and select the LR Button bear the screen to assign it.
Remember that when in the bus, if the fader glows YELLOW the level is PRE the mix fader level, and if it glows GREEN it will be POST the mic fader level
If you have any further questions, feel free to ask here or PM.