Go to the Pages app toolbar, choose Photos or Videos, navigate to the image you want to use, then click the image.
Click to select the image you want to replace, then in the Format section layout object.
You can add a media placeholder (to which you can add an image, video, or audio file) to a document. Using a media placeholder lets you easily replace media without disturbing other elements on the page.
Go to the Pages app in the section layout object. To make it editable, do the following:
Select the object; in the Format Create a caption for an image or other object.
To work with multiple images at the same time, hold down the Shift key while you click the images.
Tip: You can also break apart SVG images into shapes, then edit them individually. To learn more, see Use object styles in Pages on MacPosition and align objects in Pages on Mac