Final answer:
Revisions in the 2018 NFPA 70E standard are marked by a red square, which is hyperlinked to a comprehensive Changes and Corrections section providing descriptions of the updates.
Step-by-step explanation:
Within the 2018 NFPA 70E standard, revisions to the text from previous versions are indicated by a red square. This red square is hyperlinked in electronic versions of the document, which provides easy navigation to a description of the changes. The details about these changes are typically listed in a Changes and Corrections section, and the date on which the standard was updated can be found at the beginning of the document, usually on page ii. The record of edits and changes ensures that users are aware of the evolution of the standards and maintain compliance with the most current safety practices.