You can select the employee display order in the Rota, by using the drop down option at the top of the schedule.
Ordering
There's various options for ordering your employees:
Seniority - how long a staff member has been in employment
Alphabetically - by the employee's first name or surname
Employee number
Seniority
To use the seniority order, you'll need to add your staff's employment start date within their profile. It's under HR > Employee > Profile > Employment section.
Group by position
If you'd also like to group employees by position, this will separate your different positions (or departments) and will place them one under the other. The option can be selected under the 'Display' section to the left of the Rota.
Custom order
Whilst there isn't a specific feature to create your own custom order, some organisations will add a number in front of their employee's name. The name option can then be used from the drop down.