To apply an Activity Template from your Library to an Individual or Group Calendar:
Open the Individual or Group Calendar.
Click the gray bar on the left edge of the Calendar to open your Template Library.
Locate the desired Activity Template.
Drag the Activity Template onto the Calendar and drop it on the desired day.
To apply an Activity Template to multiple days, you can make a group selection of days, and then drag the Activity Template to any one of the days in that group.
Note that you may be prompted to select the plan to which the new Activity should be associated.