I'm a retired programmer and haven't kept up with the latest techniques. I see many web pages these days that show a photo in a new way; i.e., when I click on it, it pops up in a larger format (size) and the area surrounding gets darkened. While in this mode, the user can only hit ESC key to get back to viewing thumbnails.
I'm sure there is a tutorial here on how to code it but perhaps someone can save me a little time and point me in the right direction. I'm fairly familiar with jQuery and plain HTML but I've been unable to find info on this code -- primarily because I don't know what to search for. Tried to read the source code of some pages, but they are mostly unreadable.
TIA,
Pete