This is a modifier given before some kind of phantom concept that
involves multiple formations adjacent to each other, such as Triple
Boxes or Split Phantom Lines. Normally, when a shape-changing call is
performed under such a concept, the resulting setups "breathe" or
"shrink wrap" so that they are once again directly adjacent. The
Matrix concept prevents that. Each formation remains centered on its
original position (performing whatever internal breathing is required)
and does not move in response to the other formations. This may
create empty space, or it may cause the formations to overlap.
\sxhlines{b2s,g1n,g2s,b1n}
\sxhBBBs{g1s,b1s,b2n,g2n,.+.,.+.}
before Matrix Each Wave Ah So
after
\sxhBBBs{.+.,g1e,b2w,b1e,.+.,g4e}
\sxhlines{g1s,b1s,g4s,b2n}
before Matrix Triple Boxes Follow Thru
after
\syhBBBBs{.+.,.+.,.+.,.+.,g2n,b2n,b1s,g1s}
\sxhBBBs{.+.,g1n,b1s,g2s,b4n,.+.}
before Matrix Split Phantom Columns Expand the Column
after
The obvious way to do this concept is to concentrate very hard on where the
center of your group is. Another method that some people use is to note
how many matrix spots separate you from your counterpart in the other setup,
and do the call in such a way as to preserve that.