1. If it is your own exercise, simply open the exercise and select “Edit Media” to change the caption on the image.
2. If it is one of the exercises provided by Fiizio, open the exercise from the “My Exercises” tab.
3. Select “Copy to My Exercises” button.
4. You will now be able to adjust the exercise via “Edit Media” tabs etc.
Note: both the standard Fiizio exercise and your altered one will remain visible in your library and may cause confusion unless you title them differently, or hide one from the library. See also: How do I hide an exercise from our library?