**''[MX1:''** ''[[xy|<SourceX>,<Y>]],[[wh|<W>,<H>]]'' **'',''** ''[[xy|<TargetX>]]'' **'']''**\\
**''[MX1:''** ''<SourceX1,<Y1>,<W1>,<H1>,<TargetX1>,<SourceX2>,<Y2>,<W2>,<H2>,<TargetX2>, ...'' **'']''**

Mirror eXchange

The rectangular field at the position ''<SourceX>'', ''<Y>'' of the size ''<W>'', ''<H>'' is mirrored and then exchanged with the (identically sized) area at ''<TargetX>,<Y>''.

This modifier is similar to the **''[[mx|[MX: ]]]''** modifier, with the difference, that **''[MX: ]''** supposes the two areas are exactly at mirrored positions, so you do not need to specify the position of the second area.