Because of the size restriction and keyboard estate
limitations, many keyboard makers have come with many different methods hiding
the navigation keys and meta keys. Some
very specialized keyboards can alter the entire layout based on which mode it
is in. It’s kind of like a super CAPS
lock key if one can generalize it somewhat.
So, instead of K, it might be page down in one instance, or the number 2
or even a keyboard macro. These
multi-modal keyboards are very popular with the gaming crowds and
programmers. However, it can get tricky
tracking which mode the keyboard is on without some handy indicators. So, often Fn key becomes a critical player as
it temporarily changes the meaning a key stroke without shifting to an entire
mode. In any case, Fn key placement
becomes crucial as some people might prefer a single handed operation whereas
some prefer the Fn key is elsewhere so that they don’t have contort the fingers
just to reach some strange keyboard combo.
Instead, the more sane two handed approach is more appreciated. Thus, different keyboard makers come up with
different configuration schemes to address one or try to accommodate both. Now, I am hearing people attempting that’s
called 40% keyboard, which has even fewer keys.
So, that’s going to get complicated pretty quick.

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