Add a heading and press the return key on your keyboard to add it, or you can tap the "Generate outline with AI" button.
Click the three-dot button to the right side of the header to perform edits, and you can tap the H tag per heading to change it. Trash can icon deletes the header. You can also drag and drop headings to reorder them.
Lastly, click the "Generate instructions with AI" button to get the first pass of instructions across your header structure. The instructions part is where you can include company, client and/or product/service specific information, so the AI will cover it when it writes the full draft.
Note: Article Instructions under the H1 will apply to the entire article, so it's an opportunity to guide the style of writing. The next section, Tone of Voice, can also help get the draft closer to what you're looking for!