When you right-click on the slideshow on your timeline, you should have the option to Ungroup. You can then manipulate each slide individually.
Miga, since you have so many basic questions, you may want to check out my free 8-part Basic Training tutorial series at Premiere Elements support site Muvipix.com.
http://forums.adobe.com/thread/537685?tstart=0
They'll help you with the basics of creating a project, adding effects, titles and transitions and outputting your results.
And, if you still have questions, you may also want to consider my books, available on Amazon and at the Muvipix store, which take you step by step through every tool in the program.