*Soon as you login with L2Walker (windowed -no full screen) you can use 3 buttons of your keyboard for the basic Walker functions.
1.The button "Home" (located in button rows between alphabetic and numeric keys) is opening and closing the Walker Control Panel that you can check when you will have potions, when you will have buffs, what skills to use in fight etc.
2.The button "End" (located next to Home) that is start if pressed once the fighting with mobs progress or stops it if pressed again.
3.The button "Insert" (located next to Home and End) that if pressed deactivates all Walker Functions and if pressed again activates back the Walker.
That is the 3 buttons you must to know what it does, all the rest; check and try it your self in all possible compilations or read on forums on "how to" do several things with that program.
I hope i helped a little.
*To xw postarei allou opws to vlepeis... an den katalaveneis kati na to metafrasw.