Edit button or editable nodes?

1. What is an edit button on twitter?
2. Where is the new Edit button on twitter?

What is an edit button on twitter?

A longtime request from Twitter's user base, the edit button allows users to edit their tweets for up to 30 minutes after posting — something that could help users clarify or correct a mistake in their tweet, fix a small typo or add hashtags, among other things.

Where is the new Edit button on twitter?

The key has been to look for a little pencil icon on tweets in your feed or in tweets themselves. If you want to see an edit history, click on a tweet and then on the pencil. Tweets can be edited up to five times and only 30 minutes after someone has posted the tweet.