To create an Enrollment Field:
1. Go to Programs > Configurations > Enrollment Fields.
2. Click the Add Enrollment Field button.
3. Input the desired data for the new Enrollment Field.
4. Click the Add button. 

To add Enrollment Field to Program:
1. Go to Programs > Manage Programs and select desired program.
2. Click on the 2 Configuration tab and scroll down to Enrollment Fields.
3. Click the Add Enrollment Field button.
4. Input desired data.
5. Click the Add button

Here is a video to watch on how to add an Enrollment Field - http://vzaar.com/videos/8629778.