The first layer number isn't changing the toolpaths preview.
print settings > extrusion width > first layer
This is with any model.
Windows 7 64-bit
Slic3r 1.2.2 developer
Bugfix: object steps were not invalidated when First layer extrusion …
…width was changed. #2379
Right, changing that value didn't trigger reprocessing. Fixed.
Thank you ^^