To move a image one level backwards relative to another object, select it and do one of the following:
–On the Home tab, in the Arrange group, click
Send backward or click the arrow to the right of the
Send backward button and select Send backward from the drop-down list.
–Right-click the image to open the the context menu and select Send backward.
–When working in macOS, run the Format > Arrange > Send backward command from the command menu.
–Press Ctrl+[ in English keyboard layout (Windows, Linux) or ⌥Option+⇧Shift+⌘Cmd+B (macOS).
To place the image behind the other objects, select it and do one of the following:
–On the Home tab, in the Arrange group, click the arrow to the right of the
Send backward button. In the drop-down list, select Send to back.
–Right-click the image to open the the context menu and select Send to back.
–When working in macOS, run the Format > Arrange > Send to back command from the command menu.
–Press Ctrl+Shift+[ in English keyboard layout (Windows, Linux) or ⇧Shift+⌘Cmd+B (macOS).