Currently, fields that a user places in a document (to be filled in later by a 
database or another user) are static in length.  This means that when data is 
inserted in a field that is either longer or shorter than the static field 
length, the information is either truncated (in the printout), or white space 
is left at the end of the field.  This results in unprofessional documents and 
prevents the use of fields for creating forms that can be filled in later by 
other users (especially if the document is locked to prevent the user from 
changing important aspects of the document, such a contract language).

The fields should expand and contract dynamically, and even wrap around to the 
next line if the input is long enough.  This would allow, for example, the 
legal department to create a contract form with blanks for price, date, and 
name and address of contracting party, that a salesperson could fill in later.  
If the document is locked (and preferably the lock is password protected), the 
salesperson could not change any of the legal language, but could still 
generate a contract that looked professional.

FYI, this is the way that MS Word currently works with fields and it can be 
quite useful.