How can I add the alt tag for all my product images?

[denagpam]

Dear admin,

You know that alt tag is useful for seo. Then, how can I add the alt tag for all my product images?

Thanks.

[abolabo]

"alt" and "title" attribute values of <img> html-tag takes from "title" from details in resource library, To set it just go to edit page of product, then tab media and click on edit link of picture (i mean "pencil"). there you'll see title field.
Also you can set text for every languages of your cart.