I implemented a couple of layers on my Boston....which is probably silly with a full extra set of F-keys. The most useful thing I have done with layers is to have different functions for my Encoder:
![1800 Layout Layers 284650-0](https://geekhack.org/index.php?PHPSESSID=5ahtem3uljfssu5ab2kqte80j5ud5te4&action=dlattach;topic=116799.0;attach=284650;image)
- Layer 1: Volume /Mute
- Layer 2: Side scroll (at 1x speed)/Mute
- Layer 3: Rapid Scroll wheel (4x scroll clicks for each encoder click thanks to a for loop)/Mute
- Layer 4: Backlight brightness / Backlight on-off
Layers 2 and 3 also remap PF1 - Pf12 from F113-F24 to either ctrl-F13-F24 or alt-F13-F24
I might change the button function for Layer 2 to Ctrl to allow scrolling/zooming in some programs. Layers 1-3 have a dedicated key, Layer 4 is toggled by holding down the current layer key. I might add a "reset" button to that layer for firmware upgrades.