Smooth-zoom demonstration
This presentation details a technique for
making pictures or text zoom smoothly in a
PowerPoint presentation
The next slide gives a comparison between
smooth-zoom and regular PowerPoint zoom.
The two slides after that detail how the
technique works.
www.larkinweb.co.uk/computing/powerpoint_smoothzoom_technique.html
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Smooth-zoom
Traditional
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Smooth-zoom
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Traditional
Smooth-zoom: Large to small to large
• To begin, both large and small images are
present and are overlaid. They are exactly
centred on each other. The small image is
set to appear after the large image has
shrunk so it can’t be seen but it must be
on top initially.
• On the first click, the large image
becomes smaller. It changes to the exact
size of the smaller image
• As soon as the large image has shrunk,
the high quality small image appears,
replacing the poor quality shrunken
image.
• To expand, the small image disappears,
to be instantly replaced by the now
expanding image. The poor quality is lost
in the motion of the images.
• The same technique applies to the text
but the small image is a font of the predetermined size.
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Smooth-zoom: Small to large to small
• This technique is very similar to the
previous slide but is slightly more
complex.
• To get an image that smoothly expands
and looks good when big, you have to
start with a big image. This is what is
happening here: as soon as the slide
loads, a large image (hidden behind a
white panel) shrinks rapidly. Then, when
you click, the small image and the white
panel disappear, to be replaced by an
expanding image.
• The same process happens in reverse
when the image is shrunk again.
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