I'm looking for examples of interfaces where the user is shown part of the UI enlarged or magnified so they can perform a detailed task.
One example would be the magnified text on an iPhone when positioning the cursor.
(The background is that I'm working on a video timeline where the cursor needs to be positioned with greater accuracy than pixels allow, so I'm thinking some sort of magnified view might help. But examples don't need to be timeline based).
Any help or inspiration would be much appreciated.