Elsword controls are are rather simple.
There are two attack keys, one is z, the short ranged weak attack.
The other is x, which varies between characters. If the character has a range attack, it will cost mp, it is stronger than z attacks as well.
On short ranged characters, they don't cost mp but are also stronger than z attacks.
Skill keys are a,s,d,c, you can set whatever skill you want to any key now, however you still need the skill to actually put it in there.
There is a feature called awakening mode, in short after you attacked enemiesenough, a red orb will appear, then you press control and awakening mode begins. In this mode, everything is buffed 20% higher and some skills have new effects.
If you want to learn everything about the screen, visit this link. Screen Basics
How to add friends
If you're wondering about how to add friends, check here How to add friends
How to repair equipment
If you're wandering how to repair items before they break, check here How to repair
If you're wandering how to repair items before they break, check here, How to Refine, sell, socket, break, trash
How to alchemize and enchant
If you're wandering about this, go here Alchemize, enchant
What does each enchantment do
Go here, Enchantments
If you want to know about his, go here Stat/Slot translations.