Option to export reverse plots by pen

[jzeller2011]

I am often running into an issue with my pens running out of ink before the end of a long plot, and I'd like a way to swap out a pen refill and begin the same plot from the end, tracing the same movements in reverse. Attempting to manually reverse the gcode using a script is tricky, as the pen up/down state can easily reverse if done incorrectly it can draw the travel paths and travel for the draw paths.

Currently there is a 'Line Multipass' option in path optimization, but there is no way to control the path/draw order or to separate the multipass into a separate gcode plot.