Help please: insert new lines into existing style

This is kind of hard to explain but I’ll try. I know I’m missing something obvious. Whenever I’m doing a revision and add a new line or paragraph into an existing section already formatted in a particular style, the new line defaults to No Style. How do I change things so a new line is added into the existing style (without having to change it every time)? I hope that makes sense. Thank you.

In your style definition, what does it say for “Next Style?” If it says “None” then my understanding is that you will see the behavior you are reporting.

Thank you. I’m not sure where I would find “Next Style.”