Page 556 - ProShow Producer 9 Final Manual
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How Keyframes Affect the Timeline View
When using Keyframes to control the soundtrack, you will see some
slightly different Volume Control Points in the Timeline View. Control
points made using keyframes will appear as black dots in the timeline.
Unlike normal Volume Control Points, these points cannot be moved
using the Timeline View. To make changes to these points, you need to
return to the Slide Options window for the slide that's controlling the
Soundtrack, and adjust the timing of the keyframes.
Keep in mind that keyframes are part of the slide, not the Soundtrack. If you
change the timing or move a slide, the keyframes for that slide will affect
different parts of your Soundtrack.