I found this for adding a half title. I worked like a charm:
https://lists.oasis-open.org/archives/docbook/201212/msg2.html
From: Kevin Dunn
Sent: Friday, June 18, 2021 5:00 PM
To: docbook-apps@lists.oasis-open.org
Subject: Titlepage learning curve
I am
Release of XMLmind XML Editor v9.5.1. Highlights:
- Made the automatic upgrade of user-installed add-ons after a new
version of XXE is installed simpler, more reliable and more systematic.
However these new simplicity and reliability come at a price: using
the "Install Add-ons" dialog box,