Feature suggestion: Flip Hands

[noslowerdna]

Automating a workflow I do frequently to animate the crossed-arm version of patterns. Implementation is simply a global find-and-replace of "left" -> "temp", "right" -> "left", "zzz" -> "right" in the JML file. It's like Flip Pattern in X but leaving the coordinates unchanged.

[jkboyce]

Nice idea @noslowerdna , thanks! I'll put it in the next release as a "Swap Hands" menu option.