Quick Start
The ADM42 is very intuitive to use, however the reduced number of keys makes mandatory to learn two additionals concepts: layers and dual-function keys.
Hands placement
The standard finger position is the usual ASDF-JKL;.
For the thumbs, the left thumb should rest over the Backspace key and the right
thumb should rest over the Space key. Both thumbs share the central
Enter key.
Dual-Function Keys
Dual-functions keys are keys that combine a TAP key and a MOD.
Simply speaking: when a dual-function key is tapped, one get the tap effect of the key. When it's holded or combined with another key, it will act as a MOD.
Layers
Layers are extra «layouts» containing different keys that can be accessed temporarly when pressing the corresponding layer key.
That's like another Shift that provides access to different characters.