"Peter Jason" wrote in message
...
https://en.wikipedia.org/wiki/Pantograph
I have to engineer a wooden step to adapt
differing heights in two floors. This has to fit
within the cut walls and meet up with skirting
boards etc. Is there an app to trace around
the relevant edges and so make a pattern on a
piece of timber for subsequent fret-sawing?
It would be like a mouse, I suppose.

A profile gauge is a cheap tool to mimic the intricate bits. It's just a bar
of metal or plastic to hold a line of rods.
You push one end of the rods against the shape you want to copy & the rods
slide through the bar leaving the copied outline on the other end. They
usually cope with about 6" (150mm).

--
Regards
wasbit