Use the Specify Content to Trace page of the Add Failed Request Tracing Rule Wizard to configure the content you want to trace with a tracing rule for failed requests.
UI Element List
All content (*)
Select this option to trace all files in a directory.
Select this option to trace all .aspx files in a directory.
Select this option to trace all .asp files in a directory.
Select this option and type a value, such as "xyz.exe" or "*.jpg", to trace a failure for a custom set of content. This value can contain, at most, one wildcard and must be local to the directory where the failed request definition is set. For example, the wildcard patterns *.aspx, and ind* will all match the URL www.contoso.com/index.aspx.