This image shows what the contributor added and the markup they used. Follow these steps and you too can add content to a Wikipedia article.
Step 1: Pick a topic you want to write more about.
Step 2: Find a reliable source that covers the topic better than the current Wikipedia article.
Step 3: Now comes the fun part. Click the Edit button! A
Step 4: Add some of what is missing. Using the source you've found, summarize the information you want to add in your own words. B
Step 5: At the end of your new block of text, add a reference. In the edit toolbar—whether you're using wiki markup or the VisualEditor — you can click the 'cite' icon to cite your source. C
Step 6: In the 'edit summary' field, add a brief description of what you've done in your edit. D (With VisualEditor, you'll be prompted for an edit summary after you click Save page.) The edit summary helps other editors understand what you are doing.
Step 7: Now it's time to save your changes. Be sure to click Save page. E
Don't worry. If you make a mistake, you can always make more changes or restore a previous version of the article.