Can I rename a section in the builder so I can tell similar ones apart?

Yes.

1. In the Sections list, click the section's name to open its settings.
2. At the top of the panel there is a box holding the section's name. Type a new one, such as "Diwali banner".
3. Click Save in the top bar.

The original component name stays in small grey text above the box, and under the new name in the list, so you can still see which component it is. The new name is only a label for you in the builder. It doesn't change anything shoppers see. Clear the box to go back to the original name.

A section copied with ⧉ gets "(copy)" added to its name, so rename copies the same way.