If you do not want indenting, change the indent setting for the levels in the numbering controls.

You can set up the numbering/bullets however you like, following the instructions on Shauna's pages.

If you do not want automatic bullets, but rather want to type them in yourself, you do not need to involve the numbering at all but simply set up styles, some set for keep with next, others not. That is both far less complex and nowhere near as automatic as is in the document that I set up.

If you do not care to learn these arcane skills, I would be happy to format your document to your specifications. I would charge you $150.00 and you would not learn anything. I do not work for Microsoft. No one here does. We are volunteers trying to share what we've learned, often on forums like this, paying it forward. I am encouraging you to learn how Word works so you will no longer feel as if it is working behind you messing up your work.

If you convert your document to pdf, it stops text reflow. Each page is a page. If someone else wants to increase or decrease the font size, that person will also have to change the page size.