Graphics placed in InDesign are linked by default to the original file outside InDesign. If a placed graphic is updated outside InDesign — in Adobe Photoshop CC for instance — the graphic is automatically updated in InDesign.

Choose Window > Links to see a list of all the graphic files placed in a document in the Links panel. Each linked graphic is listed in the Links panel along with the number of the page it’s on.

Select an image in the Links panel and click the Go To Link button to select the image.

Click the Relink button with a graphic selected in the list and navigate to a replacement image. Any transformations performed in InDesign are preserved.

When you open a document with missing or modified graphics, a dialog box appears.