Knowledgebase

While adding a slide, when you select one image from the Media Uploader library the right side of the Media uploader library become active and there you can define title, caption, alt-text, description. These information is specific to the image that you select from the library and click on choose image will save the data and insert the image as slide.
You can also go to Manage Gallery option of any gallery and in each slide you will see option to edit the slide, there you can add or change title link and description for each slide.