How do I add a grid button?
To add a button, right-click in an empty part of the grid, and then click New button. To add a row of buttons, right-click anywhere in the grid, and then click Add row.
What are Edit buttons?
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.
What is button grid?
A Button Grid is a container that is used to position Action Buttons in a row or grid. ( If Action Buttons are inserted into a form without being placed into a Button Grid, they are arranged vertically, one button per line.)