In the planning, go to 'Tools' (top right) and choose 'Manage templates' to see an overview of all your day and week templates. You can also find it in the 'Venue settings' (menu icon in top right corner). When selecting a template, you can adjust the name, delete it or load the template into the schedule.
Make changes
It is very common that templates need to be changed, e.g. when a team member leaves, a new one is hired, or because it is getting busier and you simply need to schedule more team members.
You can make changes to your template by loading it into the schedule first. Perhaps you already have a week with the template loaded as it is, but if not, simply choose an empty week (maybe next year?) to load the template.
Now you can make the necessary changes, and save them:
Go to 'Tools' (top right).
Choose 'Save as template'.
Select 'Update existing template' and follow further instructions.
Go back to 'Tools' and choose 'Clear this week' in case you do not want to keep your planning for this week.