Update modified links

To update specific links, in the Links panel select one or more modified links , and then click the Update Link button or choose Update Link from the Links panel menu.
To update specific links, select the linked artwork in the illustration window. In the Control panel, click the filename, and then choose Update Link.

Note: By default, Illustrator prompts you to update a link if the source file changes. To specify that you want to update links automatically or manually, choose Edit > Preferences > File Handling & Clipboard (Windows) or Illustrator > Preferences > File Handling & Clipboard (Mac OS), and set the Update Links option.