What is SpaceFN and why you should give it a try
The SpaceFN concept - setting up your space key as a layer switch when held - is probably one of the most useful tweaks in the keyboard hobby. Let me explain how it works. My SpaceFN article on kbd.news made some rounds recently - quite surprisingly given the age of this concept. This piece you're reading is a condensed version of the full post. If you're left with unanswered questions, you'll most likely find the info you're looking for in the original write-up. On my imaginary top list of the most useful keyboard features, tweaks and hacks, SpaceFN would deserve a podium finish for sure. But what makes it so special? In short: SpaceFN is easy to implement, easy to learn, costs nothing, can be used with any keyboard, and can improve your productivity instantly. I will list its benefits below, but can state right at this point that the SpaceFN concept, setting up your space key as a layer switch when held, is clearly one of the most useful tweaks in the keyboard hobby....
Apr 30, 2024
Without first uploading new firmware, I found that typing the upper left key is a backtick (`), the bottom left key (Pn) between the left Ctrl and left Alt maps to Super_L and the Fn key between the right Alt and right Win key maps to Super_R. The Win key was not mapped. This seems to map to the custom layout as described at https://github.com/VinnyCordeiro/tmk_keyboard/blob/master/keyboard/s60-x/README.md#8--custom
Here is a annotated picture of the mappings I am seeing:
1 Standard - ANSI
The standard keymap is the one that is pre-flashed on the S60-X.