Log in to GroupDocs dashboard using your credentials.
In the Dashboard list, click Viewer.
Note: In this example, the steps to get GUID from Viewer app is shown. In order to get GUID from Annotation app, you need to select Annotation instead of Viewer while selecting the application from your dashboard. Other steps are same on both cases.
Result: The Open File window is displayed when you enter into the Viewer dashboard.
Click your preferred document to be displayed, or else click the Upload & Continue button, and then select your preferred document.
Result: The selected document is displayed using the Viewer app.
Result: The Embed this document window is displayed.
From the iFrame code, copy the GUID part as shown in the figure.
Tip You can use this GUID code while embedding the document in different third-party platforms.