To view your combos use the "B" key on your keyboard or click the Spells button in the Character Menu at the top of your screen. If you are playing a Rogue or Soldier, you will receive new "Combos" as you level up. Note that some classes receive both Spells and Combos. Combos are like Spells for melee classes, they are used to increase your DPS (Damage Per Second), but unlike Spells they require you to activate the Combo and then perform a series of swings via your directional attack buttons.

Initially Combos will only require one key press, but will become more advanced (and powerful) as you gain levels. Each Combo that you use will consume "Stamina" so watch your green bar! Stamina will replenish with rest. Additionally, combos have a cooldown period during which the combo will be unusable.