What is the process for closing the dialog after selecting online pictures?

To close the dialog after selecting online pictures, the appropriate action is to click the close button located in the upper right corner of the dialog. This button is typically designed to immediately exit the dialog window and return the user to the previous screen or main PowerPoint interface.

Using the close button is intuitive and aligns with the general user interface standards across various applications. It provides a clear indication that the dialog can be exited without any further actions or commitments.

While other methods, such as pressing the Escape key or clicking a back button, may also exit dialogs in some contexts, they can lead to different behaviors depending on the application or the specific dialog. For example, pressing Escape might not always close a dialog; it could potentially revert any changes made. The apply button generally serves a different purpose by confirming selections rather than closing the dialog. Thus, clicking the close button ensures a straightforward and universally understood method to exit the dialog.