Each layer is a different layout for your board. They are accessed using the Fn keys.
Think of them like special Shift keys. When you press shift, your layout is changed to Capital letter and symbols on the number row. Likewise, when you press the Fn key, the default map is replaced with whatever is programmed to the corresponding layer. The FN key accesses the FN layer. The FN2 key accesses Layer 2, FN3->Layer 3 and so on.
Use them like programmable shifts
Thank you for your prompt response. ah okay that makes it clear now. thanks again
So if I would like to make a play/pause shortcut key with FN, i would have to set a fn key to anywhere on the keyboard, on the FN layer set the play/pause to anywhere, then when it's done I would have to just click on FN+play/pause key location to play pause if it's on normal?
Hi zenna, I recognize that you're a Malaysian from your handle... dadudeneverabides here. You can PM me in LYN or here later (7pm+ local time) and I'll send you over an example code that I used for my ergodox. I'm at work right now, so it's a tad bit inconvenient for me to show the codes as I don't remember offhand.
On to business:
Layers work by triggering each layer with an FN key. So when you, say, press FN1 on your layout, you trigger the layerblock for it.
If, for example you want to trigger F1 when you press FN1 + 1, then you use a remapblock code instead. The code would work like using FN key to trigger the rempablock, and in the remapblock you define which key to map it to.