like click User CP... which if your looking at the forums is like in the second tool bar down on the far left...
i'm not sure what you mean by 'add comments', can you elaborate on what you're trying to do?
from daylight...
...into darkness
Do you mean comments on tabs?

The will to neither strive nor cry,
The power to feel with others give.
Calm, calm me more; nor let me die
Before I have begun to live.

-Matthew Arnold

Arguments are to be avoided; they are always vulgar and often convincing.