have a web page that allows a user user to preview the changes they made.
The page has a grid with data and the user can edit each row. In the preview, the user wants to see what he/she has changed.
Something like this grid http://www.jeasyui.com/demo/main/index.php
So I need to implement some kind of preview that show the differences. For example underlining deleted content with red, or new content with green etc.
I've searched the web for this problem but I didn't manage to find anything on the best practice about it.
Where can I read about user experience best practices related to creating a preview page with the ability to emphasize changes that were made by the user (where the user will be able to check what things they've changed, deleted or added)?