Replacing an image can give your web page a much-needed facelift without much work.  Thankfully, our block editor makes image replacements straightforward.

1. With the editor open, click the image you want to replace.
2. Click the Replace link in the toolbar.
3. Make sure to edit your alternate text area.
4. Click the blue Update button and preview the change.
   
   

For a larger image, right-click and select Open Image in New Tab

References 

• The Image Block (wordpress.org) 
• Inserting Images into Posts and Pages (wordpress.org) 
• Image Accessibility (W3C Initiative on Images)