Well… you can’t. Using midi you can have 8 scenes on your QC and 8 stomps on an external controller (using midi commands to go between scene and stomp mode quickly), or vice versa.
I keep my QC in scene mode. I have a few switches on my midi controller. Midi control switch to stomp mode, midi command for footswitch, then a 3rd command to put back into scene mode.
You may want to think differently about how you use effects. While you certainly can take any of these modelers and use them as a glorified stomp box board, use of presets and scenes gives you flexibility that previously required a dedicated midi setup.
While I still tend to think stomp box mode (old habits die hard), I work around the footswitch limitation. I use hybrid mode (4 scene, 4 effects), and set up the scenes to give me different base combinations, and then I can use the 4 stomp switches to bring others in and out. With a couple of different presets I can cover a lot of ground.
It does depend on the player and the music/situation. I don’t need gobs of effects, but doing a wide variety of covers I need the a decent collection. So I’ll set up a preset to easily cover trem and chorus, another with flange and phaser, another with filter and pitch, etc. If you look at the music you play, you’ll likely see patterns of combinations of effects.
I think I still need more time to get used to the Quad Cortex.
I originally only used Scene Mode, but recently I started wanting to assign more stomp switches.
I’ll need to come up with a good way to use both Scene Mode and Stomp Mode effectively.
I am using a MIDI controller, and what could work is to switch via the MIDI controller between stomp and scene mode. In this way, you can have a preset, 8 effects on stomps + 8 scenes with different combinations of effects. Does this make sense?