You can create new basic entries directly from the program schedule view.
Select your program in the tree, then go to the Schedule tab under Overview.
Hover over the day you want to add an entry to, then click Add.
You can also follow similar steps to create a basic entry from the Day, Week, or Agenda views.
Enter a name for your new basic entry, then change Type to Basic Entry if needed. You can also modify the Start & End Date, and uncheck Open In Agenda View if you want to stay in the calendar after creating the entry. Click Save.
You can now find your entry in the program schedule view. Hover over it for details…
…or click to open the editor window.