[M:]
[M: <X>,<Y>,<W>,<H> ]
[M: <X1>,<Y1>,<W1>,,<X2>,<Y2>,<W2>,, ...
]
Mirror
Mirrors the picture (right-left exchange) and mirrors any portion denoted by the coordinates <X>, <Y>, <W>, <H> "back". The simplest form is [M], which contains no sections which are mirrored back.
More than one area inside the mirrored picture can be mirrored back.