Edit images in bulk with WP 3.5

Hello!

I’m a photographer and previously to 3.5 I used to upload galleries for clients to see their photo sessions.

I used to edit the images in bulk, giving them a new title and alt text for better SEO. And then I used Fancy Box to get the clients to see them in a nice and smooth way.

The thing is that with 3.5 I haven’t figured out how to edit them in bulk.

Can someone help, please?

Thank you!