To suit your work style, you can enlarge or shrink the individual thumbnail images that make up each video clip (filmstrip) in the Project browser and Event browser.
To resize thumbnails:
Drag the thumbnail size slider to the right or left.
You can also expand or contract filmstrips to see more or fewer thumbnails in each clip. The expanded view makes it easier to select video more precisely. The contracted view gives you a better sense of the overall project and allows you to move clips within the project more easily.