In the Task Pane, select the Design
Library tab 
.
Right-click a folder and select Add existing folder.
In the Choose Folder dialog box, browse to a folder, then click OK.
Add an existing folder to the Design Library tab in the Task Pane. This procedure creates a shortcut. See also Add File Location.
To add an existing folder:
In the Task Pane, select the Design
Library tab .
Right-click a folder and select Add existing folder.
In the Choose Folder dialog box, browse to a folder, then click OK.
You can select Show
assemblies only to filter the files when you browse.
The folder appears below the folder you selected, with the name Shortcut to <folder_name>. You can edit the folder name.
If you delete a folder that
was added using this procedure, the folder remains on disk. Only the shortcut
is removed.