Sorry again for the questions...
What should a properly trimmed skimmer look like?
I have no idea if I am over skimming or under skimming
There are 2 ways of skimming: wet and dry.
Wet meaning it's more liquid, whilst dry is very thick.
My analogy is, wet is more like Kale juice whilst dry is like thick shake consistency.
Some people prefer one and not the other. There's no right and wrong method.
Wet is easier to clean the skimmer collection cup; it just that you need to do it more often than dry, whilst dry, the thick shake tends to stick to the collection cup, hence harder to clean, but perhaps less going to toilet to clean it.
Hope that helps!