Dewalt Table Saw Fence Question (Model 744)

If you know this popular model, please advise the purpose of the long "bar" attached to the fence that runs parallel to the fence and flips from one side to the other. Obviously, I don't have a manual. Thanks.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
A ledge to hold up the board when the fence is rolled out past the table top. john

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.