Fields are underlined "blanks" on the screen for you to fill in with information. Each field is labeled with a field name, and has space for you to type data. You enter all of the information about your CODE-1 Plus job through fields. Some fields are optional, and some fields have default values that are used if you leave them blank.
Note that there is complete online help for each field (with the cursor in a field, simply press F1 or Help). On our sample screen, the first field has the name "USPS Record Type" and has space for you to type up to a 4-digit location and a 1-character length.