OK, it's not what I thought you were saying, which is why screenshots are helpful.
This isn't present "for some files." These check boxes appear when you select multiple files. They indicate whether you want to update that field on all the files with whatever you have entered when you hit "Save." When you update a field, they are selected by default.
For example, if you were to enter a title here, the box would become checked and all the selected files would be updated with that same title. Same for all the fields.