In theory, you can also edit individual tags.

Clicking one of these displays all its information on the right, and then you can click various buttons to view any included EXIF, IPTC and XMP tags, and even the file properties (name, location, path, size, creation, modified and last access dates). Navigate to a folder containing any supported images and you'll see their summary details in a list. The fundamentals of the program work much as you'd expect.

Exif Pilot is a free tool which can help you to view any EXIF, IPTC, and XMP tags which might be embedded in a wide range of image formats (JPEG, TIFF, PNG, DNG, NEF, PEF, CR2, CRW, JP2, ORF, SRW, ARW, SR2, and PSD).