Basic (newb) Ranger attack query

Is there an attack key in GWs? Sometimes, while fighting several mobs, the following occurs: I've got one mob highlited and am attacking it. The mob dies. I highlite the next closest mob. But, my skill has not fully recharged so I cannot click on the skill to attack the mob. To click on the mob itself who is in a crowd, is not easy.
I'm wondering if there is a 'shoot' or 'attack' key I could hit in such circumstances while waiting for my special attack skill to recharge.
Thanks
How786

TAB then Spacebar

You can customize it.

I generally press 'C' to target the closest enemy or press 'tab' to cycle to another enemy after, then press 'spacebar' to actually attack them. However, as said, you can customize it to however you like from the options menu.

i customized "tab" to "F" easier to reach

Thanks for all the help guys!
How