Yes.... and in making sure of this.... I just looked up "unvoting witnesses" and found this....
https://steemit.com/witness-category/@drakos/tips-and-guidelines-voting-for-witnesses

It's so comprehensive... and SO HELPFUL. (it was written while i was away from steemit)
I just read it - and also gave @drakos my vote. Not only did he write an excellent post.... apparently he was a pirate at some point!!!! LOL and pirates have to stick together! hahahahaha i think i'm actually going to stick this into my post!!! it's very clear :) hope it helps!!!!!