A media's schedule can be copied to another media in the same campaign. With the source media selected in the Schedule Detail window, click the Copy Schedule to Another Media button 
on the tool bar.
Copy Schedule to Another Media
This feature is also available on the Campaign Information window when a single media is highlighted in the Media list.
The copy dialog displays the media being copied from and lists the other media on the campaign, regardless of media type. Check those media in the Copy To list that will receive a copy of the schedule. Care must be exercised when copying to dissimilar media, in that dayparts, descriptions, and rates may (and probably will) vary. These will need to be edited after the copy is complete.
Click Copy Selected to complete the copy. Note that any existing schedule for the media RECEIVING the copy will be replaced. Click Cancel to close the dialog when copying is complete. Also note that the act of copying a schedule to another media cannot be reversed by the Undo button.
Pro Tip
Because copying schedules from one media to another is a critical step, COMPASS will offer the opportunity to take a backup before completing the copy, allowing the results to be reversed if the outcome is not satisfactory. This precaution is highly recommended.