Q: Must I state all parameters for the lightbox plugin in the tag ?

A: No, only the tnimg and fimg parameters are manadtory

In the manual for the Lightbox plugin, we provide a example for the lightbox tag which includes all parameters.

While you can state all parameters in the tag, only 2 of them are mandatory: the tnimg and fimg parameters.

The tnimg parameter represents the thumbnail image link, while fimg represents the full image for lightbox view.
Without these 2 parameters, the plugin cannot work correctly.