Update show_image

Author: rogercgui

docs/abcd-modules/opac-abcd/opac-admin/5-viewers/show-image.md

@@ -79,6 +79,10 @@ Use this method for standard image display.
 
 ```
 
+![Images on CEPAL database](../../../../media/abcd-modules/opac-abcd/opac-admin/viewer-show_image.png)
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 ### 2. Protected Display (`<canvas>` Tag)
 
 If you want to make it difficult for users to "Right-click > Save Image As", you can render the image onto an HTML5 Canvas. This requires the OPAC's JavaScript libraries to function.