1st: Chronological
In list views, your sessions and subsessions will first be ordered chronologically. For example, the one that begins 7 AM will always display before the one that begins at 7:05 AM.
2nd: Session Type
In list views, when sessions start at the same time, they are listed based on your order of session types
Reorder your session types in the App Builder > Agenda > Session Types via drag and drop.
The most important session types should be listed on the top.
Example
Based on the screenshot below, if a session of type Keynotes and a session of type Posters both began at 7 AM, the Keynotes session would appear first in the list.
3rd - EventPilot Pro: Choice between alphabetical or session number
Subscription projects sort sessions alphabetically. EventPilot Pro users have additional order control:
In the App Builder > Settings > App Settings, you can switch between alphabetical order by title or by session number.
You can choose a different option for your sessions than for your subsessions, if desired.
For example, could have your parent sessions appear in alphabetical order based on their title. Each presentation (sub-session) within the parent session would be listed based on the session number. Note that session numbers are alphanumeric fields. That means if you have double digit number of sub-sessions, start with 01, 02 ...
If you have 9 or fewer sub-sessions, you can use 1, 2, ...