The symbols that appear before Start, End and Time Zone, indicate that these parameters can be overwritten by application configuration at the time of deployment. This allows administrators to override these parameters without affecting the business logic of the project.
Start and End values are configured using your arrow keys:
The left and right arrows let you select the portion of the value to edit.
The up and down arrows allow you to edit the selected portion.
You can also edit the value by clicking on the Start and End value portion you want to edit and use the up and down arrows at the end of the field.
Start, End, and Time Zone are used to control the triggers as follows:
Start: Specifies the date and time when the triggers defined is this group start, once the respective service assembly has been deployed and started. The date and time format is defined by the Date Format field. The Now option specifies that triggers are active immediately after deployment.
End: Specifies the date and time when the triggers defined is this group end, once the respective service assembly is running. The date and time format is defined by the Date Format field. The Never option specifies that triggers are never always remain active after deployment.
Time Zone: Specifies the appropriate time zone for the environment where the deployed scheduler runs. This value overrides any time zones specified in the Start and End fields. The Default option specifies the configured time zone for the computer as the selected value.