You can indicate what happens when you click on the image.

It will be nice if we can make use of title attribute to hint what happens when you click on the image. Say for example you set title attribute to "click view book review" or "click to view hires image" or "click to download hires image"

With title attribute in place, it will be pop up whenever the user moves the cursor over figure/image block.

The editor or author should be able to set the title attribute like you can set Alternative text under settings.
Thanks.