Properties
To edit the Properties of a item in the Resource Manager, click on the Properties link next to that resource. This will bring up a new window showing the path to the resource and its current file name, display name and description. Any of these Properties can be edited in this window and will automatically update for all occurances of the file.
The Description field is used to generate "alt" tags in the HTML of your page. These "alt" tags are used by accessibility applications like screen readers to help people with vision impairment interpret page content.