Final answer:
Layout view is the answer, allowing changes to report design while viewing live data, unlike Report view or Print Preview which do not allow design changes, and Design view where data is not displayed.
Step-by-step explanation:
The view that shows the report and the data, where some report design elements such as field lengths and fonts can be changed, is the Layout view. This view is particularly useful for making design changes while being able to see the live data.
It differs from the Report view, which shows the report as it will appear when printed but doesn't allow design changes, and the Print Preview, which shows exactly how the report will look when printed. The Design view allows for changes to the structure and design but does not display the data.