You can use topics to tell Blaze what to make content about for the next week.
You can review next week's topics by going to Brand Plan → Edit Topics
This will allow you to review the week's set of topics, remove or add topics, as well as adjust the number of posts to generate per platform.
Note that editing topics will only be possible if the content has not been generated yet for the week. If the content has already been generated you can instead click on "See Content" to look at the generated posts on the Calendar.
Please note that the number of topics listed in each section corresponds to the number of posts you're requesting in that week's Brand Plan, so you can't add more topics than there are posts requested.
