Large Images
 

I am posting scans of old newspapers. I want the images to come up in Photopost at 1,000 px wide, but have it possible for the user to click on the image to enlarge it to 1,200 px or perhaps larger.

As of now, I upload them 1,200 wide. My trigger for medium-width generation is 960 px.

When the images are displayed, clicking on them does not cause them to become larger.

Do you have suggestions as to what I may be doing wrong?

well I need a url to really comment but are you sure you have in show photo options the options to use a popup window to see large image set to yes?