I need help on how to add an alt tag on thumbnail images. I saw here on the other post that it inherits the title of the category (https://community.magento.com/t5/Magento-1-x-Programming/How-to-add-alt-tag-to-category-pictures/td-...). But on my case, it doesn't inherit the categories title as alt tag. Are there other way I could add alt tag?
In back end how can I do it? What file will I access? Thanks