There is a "+" in front of the total Directory. Click this "+" to display its sub-directories. "+" is changed to "-" and "-", you can hide its subdirectories, just like in the resource manager. This requires two pages, one for the total directory and the other for the sub-directory. Set "+" on the page of the total directory to a hyperlink, and add the address of the subdirectory page in the "Link" column. Set the "-" on the page of the subdirectory to a hyperlink and add the address of the total directory page in the "Link" column. For more information, see The Dreamweaver Help document. In this help document, click the total directory to bring up the subdirectory. Press the total directory on the subdirectory to return to the total directory, it's just not represented by "+" or. Let's take a look at the source code of this document.
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