drawsegments is easy.
First define the param, which are the default layer, thickness and other draw parameters.
Then list the points you want connected with line segments. Just a list of x then y repeated as many times as you need:
0.3 mm t param Edge.Cuts l param 0,0,10,0,10,-10,0,-10,0,0 mm drawsegments
There’s an error in drawsegments that currently misinterprets the layer, so it must be entered like this:
0.3 mm t param Edge.Cuts layernums l param
But I’ll fix that next release.
You can also select whatever you’ve drawn and scale all segments selected to any desired dimension.
Edit to add: and when you’re done, you can round each vertex to a specific radius.
round (Category: Draw) [RADIUS SEGMENTLIST] Round the corners of connected line segments within SEGMENTLIST by adding ARCs of specified RADIUS.