To select multiple linked objects, hold down CTRL and click each linked object.
Change a linked object's setting to automatic or manual updating
To update a linked object every time you open the file that contains the object or any time the linked object changes while the file is open, click Automatic update.
Manually update a linked object when you choose
Click the linked object, and then click Update Now.
Prevent a linked object from being updated
Select the Locked check box.
Break a connection to a linked object
Click Break Link.
Note After you break the connection to a linked object, you must reinsert it into your file to reconnect.