Logs that are configured with Dynamic legends need no additional input from the user besides selecting the Quick Log or Report Profile.
If there are more legend items than spaces provided, the log will simply generate with as many items for which there is space. No warning is given.
To set the logs as default for quick logs click here: https://bentleysystems.service-now.com/community?id=kb_article_view&sysparm_article=KB0035426
To create a report profile with dynamic logs click here: https://bentleysystems.service-now.com/community?id=kb_article_view&sysparm_article=KB0035522