slide block ppt

F

Fede

I'm working on a PPT presentation and a colleague give to me a few slides to
be integrated in my presentation., but is impossible to me open or change
anything in this part of the presentation. I can see it in "slide
classifier" and in "slide presentation" but is impossible to see the slide
"one per page". If I use slide presentation (I can see it) and then I cancel
this action the slide screen becomes fully black.
Help! we daon't know what really happened.
Many thanks in advance.
Federico from Spain.
 
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