To insert an image (including a single page PDF) inside one or more existing shapes:
Select the shape(s) that are to receive the image. One or more of these shapes may already contain an image - any existing images will be replaced by the new image.
To insert the image:
Either, choose Insert > Image...
Or, click the Image checkbox in the Image Inspector until it displays a tick.
NOTE: If the Image checkbox shows a dash , this indicates that the current selection contains at least one shape with an existing image and at least one shape with no image. To continue editing all of the selected shapes together, click the Image checkbox to change the dash to a tick.
Browse for and select the image file.
Alternatively, insert an image using copy and paste, or drag and drop.
IMPORTANT: When copying or dragging a raster image (with PNG, JPEG, or GIF file format) from some applications (including web browsers) the image may only be made available on the system Clipboard to paste or drop in TIFF format. TIFF uses lossless compression (or no compression), which can greatly increase the file storage size compared to the original image format. To prevent document file size bloat you should avoid pasting or dropping TIFF converted images into a document directly from these applications. Instead, save or export an image in its native file format to your Mac's file system, before then inserting it into your document as a separate step. No TIFF conversion takes place when using copy and paste, or drag and drop, to add image files from Finder (which includes files on your Desktop), or to transfer images within or between iStudio Publisher documents.
NOTE: After adding an image to a document you can check its file format using the Image Inspector.