When I browse images in a sub-folder(web album), the cursor placed on an image displays a serial number and possibly the associated comment. The implementation of this system is still a mystery to me: I did not identify the right parameter.I usually use a template album to generate the settings for the album being installed. But this is not very practical and sometimes ineffective.
These settings will show the caption as a tooltip - i.e., you will see the caption when you hover on the thumbnail, instead of having the caption always visible above, below, or superimposed on the thumbnail.
The caption will consist of the serial number, the file title (if you have entered one), and the comment (if you have entered one).
You can choose other caption contents using the Presets options.