I get more and more used to shortcuts, like "E" for next round and the WASD keys to navigate the map, rather than using the arrow keys.

1. is there a list somewhere of all available shortcuts?
2. is there a way to customize the shortcuts?
3. is there a shortcut to switch to the next unit in battles?

About position 3, If you have a lot of archers or ranged units, it would be more convenient to hover with the mouse over the enemy you want to take out and switch via hotkey through your units to click/fire if the target is in range.

Actual I found this of a helpful community member, but this cannot be all and is not official (searching over google back to GOG forums :)) http://www.gog.com/forum/eador_series/change_keyboard_shortcuts

There is at least in Genesis and that is the Space Bar. Not sure if this is true or not for Masters though.

Sadly as for the other 2 concerns that's more likely with Masters that apparently came with a manual unlike Genesis.

GENESIS ROCKS!!!

Thanks, I did actual read the complete manual of Masters of the Broken Worlds and it is a sometimes funny to read background story about the game, with little information about actual usage :P

It completely misses things like building trees, detailed information about buildings, shortcuts or actual formulas for calculation of damage and many other things (which can be found on their website via google only or partial on the MOTBW wiki page).

I am not at home and cannot test. If you use the spacebar, it doesn't put the unit to rest, right?

p.s. spacebar doesn't work in MOTBW

pp.s. it is "N" to switch between units on the combat screen. I found it by hovering over the button at the bottom of the screen :D