How to tighten belts on Accent?
 

My garage recently replaced the belts on my Accent 1.6L. It drove fine
for two weeks but then it developed a squeak. I noticed that one belt
did not turn everytime it squeaked. The garage just took a few minutes
to tighten the belts and that fixed the squeak problem.

It seems like a simple job and only required a couple of key wrenches.
I did not want to cramp the mechanic while he was working so I did not
see exactly what he did.

Is there a step by step on how to tighten belts on Accent 1.6L?