Indicating a change to a data field in an electronic data entry form, such as a Web page, database form, or other electronic form. Upon loading an electronic data entry form, an initial content of each data field is stored. User interaction with a data field is detected, and the current content of the data field is compared to the initial content. If the content changes from its initial content, an indicator associated with the changed data field is activated. The indicator may include an icon displayed adjacent to the data field, a change in data field border, font, color, or other sensory characteristic. If a nested data field is modified, a second indicator may be activated for the nested data field. Any indicator may be deactivated if a reset function is activated, or the new data is submitted to a server or database for further action or permanent storage.