Martin Audio MLA User Manual page 251

MLA System
USER GUIDE
There are however additional options for ground stacked systems of eight or more MLA Mini, the black arrow against these
brings out the option for stacking the MSX either horizontally or vertically;-
Selecting the various modes will change the array thumbnails accordingly and also importantly shows how the arrays should be
cabled. This is particularly important as flown systems are cabled the opposite way to ground stacked with the longest NL4 cable
reaching down to the lowest cabinet. For example Flown will appear like so;-
MLA System User Guide V2.1
251