How are comments added to buttons in the electronic documentation system?

Adding comments to buttons in an electronic documentation system typically involves a process where users can directly interact with the button functionality. The correct answer highlights that users can input text directly after clicking on the button, which allows for immediate feedback or clarification related to that specific button's action or purpose. This interaction is intuitive, catering to user experience by ensuring that comments are easily associated with the respective button without requiring navigation to a separate area of the interface.

The other methods, while they may seem plausible, do not align with standard practices for efficiently adding comments in such systems. Using a separate comments section could disconnect the feedback from the actual button, making it less effective. Editing the button title is not typically considered a comment; it changes the functional label of the button itself rather than provides supplementary information. Holding and dragging is generally associated with moving or resizing elements rather than providing textual input like comments. This context clarifies why the direct interaction method is the most practical approach.