Image Page Align Center

In contentr setup:  Click the Image icon on the button bar.  Select the image to upload, it will be centered on page. Click the image in the editor, Right-Click Image Icon, then select up to 100% for width.  You can fine tune centering with the Paragraph Formats Icon.

Upload two images. Right-Click an image.  Change Width to 48% or less for each images  You can fine tune centering with the Paragraph Formats | Align Left or Align Right and then the Right or Left to appear side by side as below.

More views of Chicago skyscrapers.