PhotoshopElements
Adjust the display time of a slide
In the Presentation Options section
of the PDF Slide Show box, click the Presentation button in the
Output settings of the PDF Slide Show dialog box. Then, set the
number of seconds in the Advance Every option. You can open the PDF
Slide Show dialog box when you first create a slide show (using
the Create tab), or when you share it (using the Share tab).