I want to do a quiz using pictures with powerpoint 97.
Sequence: 
1) Slide shows up, picture is not visible, covered up by e.g.
rectangles.
2) I click to the rectangle, the rectangle dissapears, showing the
part of the picture below.
3) People try to find out, what the picture shows

4) repeat 2 and 3 until picture is covered up or guessed.
5) go to next slide

How can this be done?

Maybe you also know of an freeware programm doing the same thing.

Gzell --

Thank you for testing GA researchers' knowledge of Powerpoint!

There are two ways to do this, though only one allows you (or the
audience) to choose what gets revealed randomly.  I've set both
examples up in a demonstration file that is linked at the end.

1st METHOD
----------

Using the animation features (SlideShow/Animation/Custom Animation)
you can bring in blocks of a picture with a R mouseclick -- or timed. 
For this to work properly, you'll:
1.  use a graphics package to divide your picture into rectangles
2.  place each of the rectangles onto a Powerpoint slide
3.  use the following commands to set up the order in which they're
revealed:
   SlideShow/Custom Animation (select the rectangles)/Order & timing

Advantages: file can't be changed when in SlideShow mode
Disadvantages: order of each rectangle's appearance is pre-determined

2nd METHOD
----------

Place your picture on the Powerpoint slide.  Use the draw tool to
place a block over each section of the picture that you wish to cover.
 Save the file.

1.  Re-open the file
2.  Use File/Save As command to RENAME file so that you're not
altering the archived copy
3.  Use the pointer to highlight the block that you wish to delete. 
Hit the delete button.

Advantages: fully random.
Disadvantages: the danger of altering the archive copy -- that's why
step #2 was inserted.  Also, PowerPoint's toolbars take up part of the
screen.

I've created an example Powerpoint presentation and saved it for you
here.  Though I created this in Powerpoint2000, I've saved it in the
Powerpoint97 format -- and unfortunately it's made it about a 2.1M
file.  You'll be able to save this and use it locally in your copy of
Powerpoint, just be careful to store it in the right directory, as
browsers often stuff things deep in a Windows/Internet subdirectory:
www.mooneyevents.com/temp.ppt

Now please note that method 1 works when you run PowerPoint's
SlideShow  -- all you need is click the right button of the mouse to
make it work.

For method 2 to work, you'll enter PowerPoint as if to edit the slide;
follow the instructions above; then delete the blocks covering up the
image of . . .

Good luck,

Omnivorous-GA