Folders and files can be linked to locations in the file system outside of the project's location. These special folders and files are called linked resources.
To create a linked folder:
To create a linked file, follow the same steps as above, except choose New > File instead of New > Folder in the context menu.
Linked resource locations can also be specified relative to a variable. This makes it easier to share projects containing linked resources with other team members, since it avoids hard-coded absolute file system paths that may vary from one machine to the next.
To define a linked resource relative to a path variable, do the following after step 5 above:
Tip: The General > Workspace > Linked Resources preference page also allows you to define path variables.
Note that, once you create a linked resource you will be able to change the link target path that you entered in step 6. or 8. above. by selecting the Edit... button in the File > Properties > Resource property page of the linked resource.
Resources
Resource hierarchies
Linked resources