Among the options provided, highlighting is typically the most useful method for making details stand out. It allows you to emphasize specific information in your notes, making key points easily identifiable and visually distinct.
However, depending on the context and purpose of your study, other methods like flash cards can also effectively highlight important concepts, especially for memorization and active recall.
Conceptual note-taking focuses on organizing information in a way that emphasizes relationships between ideas, while sequential note-taking organizes information in chronological order, which may not specifically emphasize details.
In summary, for making details stand out visually, highlighting is usually the best choice.