When writing comments on GitHub, the text formatting toolbar helps users format Markdown without manually typing all Markdown syntax. One action available through this toolbar is adding a list, such as a bulleted list or numbered list. This makes issue comments, pull request discussions, and discussion replies easier to structure and read. The toolbar is focused on formatting written content, not repository management actions. Merging branches is handled through Git or pull request workflows.
Assigning an issue is done through issue metadata and permissions, not through the formatting toolbar.
Scheduling a pull request is not a standard action in the comment formatting toolbar. Therefore, the action connected to the toolbar is adding a list to the comment text.