This article explains how to add the Default Task Type field to your OnePlan group. The Default Task Type is also referred to as "Scheduling Mode."
In certain OnePlan groups, the default task type field is already available. The steps in this article are for older groups that don't have the field by default. When the Default Task Type field is there, it works according to What is Scheduling Mode?
As an admin, navigate to the following URL to get to the back-end tools page: my.oneplan.ai/config/tools.
Click the Run Tool button for Add Task Type Field. This will add a plan-level field called Default Task Type to your OnePlan group.