Well, it depends on the person. Everyone is different.

But, depression isn't always a 10. It can be anywhere on the scale of severity.

Hypomania is a lower level of mania, so a person could be speeding up but not fully manic with their racing thoughts, pressured speach, and so on. Not everyone exhibits what appears to be "crazy behavior" in mania. My mother-in-law, for example, I know when she's manic because she can't stop cleaning. But, she doesn't appear frantic or anything. For me, I just can't shut up or concentrate because my mind is going so fast, and I take on a ton of big creative projects that I never finish.

The writing over and over but closing the document, that could be what I call an "obsessive thougth loop." I don't know the technical term, but I have it all the time. I just have to keep at something even if I feel it's futile. It's very annoying and time consuming.