As a general rule, how many headings are appropriate in organizing a document and displaying hierarchy?

The number of headings used to organize a document and display hierarchy can vary greatly depending on the length and complexity of the content. However, as a general rule, it's good to have at least three levels of headings to clearly indicate the main sections, sub-sections, and any further divisions within those.

Here's a step-by-step guide:

1. Start with a main heading: This is usually the title of your document or the main topic. It's the highest level of your hierarchy and gives the reader an idea of what the entire document is about.

2. Use sub-headings to break down the main topic: These are your second level headings. They break down the main topic into its major components or ideas.

3. Use sub-sub-headings for further divisions: These are your third level headings. They break down the sub-topics into smaller parts or details.

Remember, the key is to keep your headings clear and descriptive. They should give the reader an idea of what each section or sub-section is about. Also, try to keep the number of levels to a minimum. Too many levels can make the document confusing and hard to follow.