Final answer:
The most useful function of a word processing program for comparison is the 'Compare Documents' feature.
Step-by-step explanation:
The most useful function of a word processing program for comparison is the 'Compare Documents' feature. This feature allows you to compare two different versions of a document to identify and highlight any changes or differences between them. It can be helpful when working collaboratively on a document or when reviewing edits made by others.
Here's how you can use the 'Compare Documents' function:
- Open the original version of the document and go to the 'Review' tab.
- Click on 'Compare' and then select 'Compare Documents.'
- Choose the revised version of the document that you want to compare.
- The program will then generate a new document that highlights the changes, with additions shown in a different color and deletions shown with strikethrough text.
By using this function, you can easily track changes and make comparisons between different versions of a document.