This page overrides the secondary and tertiary column settings by placing the secondary on the left and the tertiary column on the right.
The relevant YAML frontmatter for this page is:
---
layout: page
title: Left secondary right tertiary column
menuInclude: yes
menuTopTitle: Layout
menuSubs:
- title: Left secondary, right tertiary
index: 7
secondary-column: left
tertiary-column: present
---