How to add image meta data

Meta data needs to be added to each image in each of the image galleries listed below.

A Midsummer Night's Dream, Northern Broadsides, 1994, rehearsal pictures
Alcestis, Northern Broadsides, 2000, performance photos
Macbeth, Northern Broadsides, 2002, performance photos
Macbeth, Northern Broadsides, 2002, wardrobe book (Mel)

Each image gallery has a link to a spreadsheet containing the information that needs to be added.

The following 2 videos explain how to do this: