problems inherent to this field of endeavor are 1 ) once a document is created , it cannot be presented in different fonts , colors , and / or languages , unless a copy of it is made , the desired changes in fonts , colors , and / or languages are applied to the copy , and the copy is saved as a separate entity , 2 ) the time and effort required to display documents in different fonts , colors , and / or languages erodes the value , and 3 ) applications that use documents are thereby limited .