Over the last few years I've posted several images of one thing or another, but my posts will always have the resulting full-size image which I know uses more of the available server memory and increases loading times.
While reducing the image resolution has been quite helpful, many other posts have a tiny image that expands, or opens in another window, when I click on it.
I've tried the Search for how to post a tiny image that expands, but have had no luck.
So how is this done?
Any responses appreciated.