Hello Shadia! Mr Nijin Ashok has given the guidance which should clear the doubts. However I am trying o give below the practical way of making Headings and sub headings.
After posting the articles with headings and contents, use the following practice:
For Heading: type the following before the heading and after the heading.
Heading Words(first press the key for symbol '<'. Then type h2 for heading and h3 for sub heading. After that type the slash / and the key for symbol '>'. This will show the heading in bold and in blue colour when published. Same procedure for sub heading except that you have to type h3 for sub heading instead of h2.
For Sub Heading: type the following:
Sub Heading Words - First the symbol '<'. Then type h3. Then type the sumbol '>'.
The sub heading will be bold and blue in colour but less bold than heading.
For paragraphing: After preparing the article: Keep the cursor at the end of the sentence after which you want the paragraph and press 'Enter'. This will create the paragraph.
Ramanathan A R