Container holding all picture elements scanned py PSWP. Can follow directly after g-pswp or be placed elsewhere inside the pjax-bounderies for galleries. Can be omitted, if picture elements are inserted directly by using [[!img ...]]. Ratio set by 'b' (width) and 'h' (height) variable. Max width 1200 and max height 750 (this is site dimension constraint set!). Gallery is showing caption, if provided.