Problem when Using variables and Automatically revisit

Thanks Garth yorko! but there is problem, each topic slide have Buttons especially in the topic 2 have 2 buttons and each button have another explanations and there also some buttons. if I use all in layers its difficult to call layer objects in another layer right. for example if I add a smiley object in layer 1 I couldn't  call this smiley in 2nd layer right. and more over making all these in single slide requires lot of triggers  which make us little confuse we open after some time. i will share you my SL if you are free ping me at my mail once.