no Fn key — it is not an appropriate modifier
Where keyboards have no Fn key, if you deselect
[ ] Open "SizeWell Zoom Options" menu instead of doing standard zoom behaviour
— then it is impossible to use the shortcut for SizeWell zoom options.
Please set, or allow, a modifier key that is more commonly available.
Cross reference: http://gsfn.us/t/28rgh
> standard zoom must have an ergonomic keyboard shortcut