Is it possible to re-use media files a template?
When creating a new project you can use other pages saved as templates. Saved templates may have media files in them which can be re-used.
If you find that the media files are not linked to re-add them to your new project this is normally because the files have been saved as one large image. You should use a picture editor to crop the image and save it or you can simply use the crop tool in the Page Designer to crop into any type of media file.