You can import tasks into your schedules from the 10-2 Tasks window.
Open 10-3 Schedules.
In the Task# column, right-click a cell, and then select the importation method.
Alternatively, you can click the drop-down arrow to display the Lookup window.
Double-click the tasks you want to import into the schedule.
If you are in a Picklist window, double-click all the items you want to import, and then click the check mark button.